M255 251 Mersenne number exponent details

	Trial Factoring	P-1 Factoring	Combined
Limit	GHz-days	Probability	B1	B2	GHz-days	Probability	GHz-days	Probability
Actual	2⁷⁰	936.1398	74.2857%	1000000000	201454308905850	89,307.9112	27.9451%	90,244.0511	81.4716%
Target	2⁴⁴	0.0000	59.0909%	4500	110000	0.0001	10.1928%	0.0001	63.2607%
Difference	+26	+936.1398	+15.1948%	+999995500	+201454308795850	+89,307.9111	+17.7523%	+90,244.0510	+18.2109%

	GHz-Days	worth	Factor probability
date	userid	compid	b1	b2	e	stage	factor	digits	bits*	spent	saved
2000-12-14	ANONYMOUS	v4_computers	95000	3800000		-		-	-	0.002	-	-	1.513%
2001-06-17	ANONYMOUS	v4_computers	100000	10000000		-		-	-	0.005	-	-	1.893%
2002-06-02	ANONYMOUS	v4_computers	32768	3276800		-		-	-	0.002	-	-	1.020%
2002-08-10	ANONYMOUS	v4_computers	65536	6553600		-		-	-	0.003	-	-	1.526%
2003-03-07	ANONYMOUS	v4_computers	131072	13107200		-		-	-	0.007	-	-	2.152%
2003-11-08	ANONYMOUS	v4_computers	262144	26214400		-		-	-	0.014	-	-	2.892%
2011-02-09	Jocelyn Larouche	Manual testing	2000000	2000000		-		-	-	0.016	-	-	1.897%
2012-02-26	Jocelyn Larouche	Manual testing	2439304	2439304		-		-	-	0.020	-	-	2.050%
2013-10-14	David Campeau	i5-2500k	2560000	71680000		-		-	-	0.051	-	-	4.886%
2015-01-16	thelegendarymudkip	i5-4670k	10000000	250000000		-		-	-	0.188	-	-	6.782%
2016-05-13	mognuts	Manual testing	2854	71350		-		-	-	5.35832e-5	-	-	0.074%
2021-12-05	Seth_Tr	Manual testing	120000000	120000000		-		-	-	0.976	-	-	6.340%
2021-12-05	Seth_Tr	Manual testing	120000000	57783635910		-		-	-	26.54	-	-	15.133%
2022-03-31	Anton Repko	Manual testing	1000000000	201454308905850		-		-	-	89,308	-	-	27.945%

date	userid	compid	b1	b2	start	factor	bits*	ghz-days
2023-01-27	masser	Manual testing	30000000	990000000	2	7	-	-	0.788
2023-02-05	masser	Manual testing	30000000	960000000	195	59	-	-	0.775
2023-02-11	masser	Manual testing	30000000	990000000	6	5	-	-	0.788

	Bits	Factor	GHz-Days	worth
date	userid	compid	from	to	factor	bits*	digits	spent	saved
1999-11-24	ANONYMOUS	v4_computers	2⁵²	2⁵³		-	-	0.002	-	-
2000-04-27	ANONYMOUS	v4_computers	2¹	2⁵⁴		-	-	0.009	-	-
2000-12-14	ANONYMOUS	v4_computers	2¹	2⁵⁵		-	-	0.019	-	-
2001-02-18	ANONYMOUS	v4_computers	2¹	2⁵⁶		-	-	0.038	-	-
2002-03-16	ANONYMOUS	v4_computers	2¹	2⁵⁷		-	-	0.075	-	-
2004-02-14	ANONYMOUS	v4_computers	2¹	2⁵⁸		-	-	0.150	-	-
2009-01-01	Sturle Sunde	gobi.ifi	2⁵⁸	2⁵⁹		-	-	0.150	-	-
2009-01-25	Sturle Sunde	ginjtje.ifi	2⁵⁹	2⁶⁰		-	-	0.301	-	-
2013-07-25	Sid & Andy	Buzz	2⁶⁰	2⁶¹		-	-	0.602	-	-
2015-08-25	NR	Manual testing	2⁶¹	2⁶²		-	-	1.203	-	-
2016-01-30	Gordon Spence	Manual testing	2⁶²	2⁶³		-	-	3.846	-	-
2016-01-30	Gordon Spence	Manual testing	2⁶³	2⁶⁴		-	-	7.692	-	-
2018-03-15	Gordon Spence	Manual testing	2⁶⁴	2⁶⁵		-	-	14.64	-	-
2020-01-01	Gordon Spence	Manual testing	2⁶⁵	2⁶⁶		-	-	29.28	-	-
2022-03-12	Anton Repko	Manual testing	2⁶⁶	2⁷⁰		-	-	878.3	-	-

ECM factoring results:

Total ECM effort:	878.513 GHz-days
Estimated T-Level:	34.540

Digits	B1	Complete	FacMiss
20	11000	221.202	0.000%
25	50000	47.595	0.000%
30	250000	7.369	0.063%
35	1000000	0.908	40.333%
40	3000000	0.093	91.163%
45	11000000	0.008	99.208%

ECM Summary

B1	B2	curves	GHz-days
50000	5000000	307	1.837
250000	25000000	580	17.35
1000000	100000000	100	11.97
1000000	2842011315	700	847.4

ECM Details

										GHz-Days
date	userid	compid	b1	b2	factor	bits*	curve#	stage#	sigma	numcurves	spent
2007-08-09	George Woltman	D_P4Debug	50000	5000000						1	0.006
2007-08-17	ANONYMOUS	Bayes	50000	5000000						1	0.006
2007-08-29	Chad Davis	Bayes	50000	5000000						1	0.006
2007-09-10	Chad Davis	Bayes	50000	5000000						1	0.006
2007-10-09	Team_Bundu	bundu1	50000	5000000						1	0.006
2007-12-27	Steve Scott	805D	50000	5000000						1	0.006
2007-12-27	Steve Scott	Abit	50000	5000000						1	0.006
2007-12-27	Steve Scott	Epox	50000	5000000						1	0.006
2007-12-27	Steve Scott	Asus-1	50000	5000000						1	0.006
2007-12-27	Steve Scott	805D	50000	5000000						1	0.006
2007-12-27	Steve Scott	Celeron	50000	5000000						1	0.006
2008-01-07	Steve Scott	Abit	50000	5000000						1	0.006
2008-03-13	Steve Scott	Sue	50000	5000000						3	0.018
2008-08-31	Sturle Sunde	v22	50000	5000000						3	0.018
2008-09-22	Sturle Sunde	v21	50000	5000000						3	0.018
2008-10-22	Sturle Sunde	v23	50000	5000000						3	0.018
2008-11-23	Sturle Sunde	v21	50000	5000000						3	0.018
2008-12-13	Sturle Sunde	v23	50000	5000000						3	0.018
2009-01-21	Sturle Sunde	v22	50000	5000000						3	0.018
2009-02-27	Carsten Kossendey	durandal	50000	5000000						1	0.006
2009-02-28	Sturle Sunde	v21	50000	5000000						3	0.018
2009-03-12	ANONYMOUS	v23	50000	5000000						3	0.018
2009-03-30	Sturle Sunde	v22	50000	5000000						3	0.018
2009-04-07	Carsten Kossendey	Manual testing	50000	5000000						1	0.006
2009-04-15	Sturle Sunde	v23	50000	5000000						3	0.018
2009-04-19	Sturle Sunde	v21	50000	5000000						3	0.018
2009-04-23	Sturle Sunde	v23	50000	5000000						3	0.018
2009-04-26	Sturle Sunde	v21	50000	5000000						3	0.018
2009-04-29	Sturle Sunde	v21	50000	5000000						3	0.018
2009-05-04	Sturle Sunde	v21	50000	5000000						3	0.018
2009-05-11	Sturle Sunde	v21	50000	5000000						3	0.018
2009-05-12	Sturle Sunde	v21	50000	5000000						3	0.018
2009-05-15	Sturle Sunde	v23	50000	5000000						3	0.018
2009-05-19	Sturle Sunde	v21	50000	5000000						3	0.018
2009-05-23	Sturle Sunde	v21	50000	5000000						3	0.018
2009-05-27	Sturle Sunde	v21	50000	5000000						3	0.018
2009-05-31	ClknGo Software	cngws2	50000	5000000						3	0.018
2009-06-04	Sturle Sunde	v23	50000	5000000						3	0.018
2009-06-08	ANONYMOUS	v23	50000	5000000						3	0.018
2009-06-13	linded	23G4692-Lib1	50000	5000000						3	0.018
2009-06-17	ClknGo Software	cngws2	50000	5000000						3	0.018
2009-06-25	Sturle Sunde	v21	50000	5000000						3	0.018
2009-07-07	Sturle Sunde	v23	50000	5000000						3	0.018
2009-07-20	linded	23G4692-Lib1	50000	5000000						3	0.018
2009-08-02	Sturle Sunde	v23	50000	5000000						3	0.018
2009-08-15	Sturle Sunde	v21	50000	5000000						3	0.018
2009-08-25	Sturle Sunde	v21	50000	5000000						3	0.018
2009-08-27	Sturle Sunde	v21	50000	5000000						3	0.018
2009-08-31	Sturle Sunde	v23	50000	5000000						3	0.018
2009-09-03	Sturle Sunde	v21	50000	5000000						3	0.018
2009-09-09	Sturle Sunde	v23	50000	5000000						3	0.018
2009-09-13	ANONYMOUS	v21	50000	5000000						3	0.018
2009-09-16	ANONYMOUS	v23	50000	5000000						3	0.018
2009-09-20	Sturle Sunde	v23	50000	5000000						3	0.018
2009-09-23	Sturle Sunde	v21	50000	5000000						3	0.018
2009-09-26	Sturle Sunde	v23	50000	5000000						3	0.018
2009-09-30	Sturle Sunde	v21	50000	5000000						3	0.018
2009-10-05	Sturle Sunde	v21	50000	5000000						3	0.018
2009-10-13	Lackó	Iroda_Andras	50000	5000000						3	0.018
2009-10-15	Sturle Sunde	v23	50000	5000000						3	0.018
2009-10-18	Sturle Sunde	v21	50000	5000000						3	0.018
2009-10-22	Sturle Sunde	v21	50000	5000000						3	0.018
2009-10-24	Sturle Sunde	v21	50000	5000000						3	0.018
2009-10-28	Sturle Sunde	v21	50000	5000000						3	0.018
2009-10-28	Sturle Sunde	v23	50000	5000000						3	0.018
2009-10-30	Sturle Sunde	v21	50000	5000000						3	0.018
2009-11-02	Sturle Sunde	v21	50000	5000000						3	0.018
2009-11-04	Sturle Sunde	v23	50000	5000000						3	0.018
2009-11-07	Sturle Sunde	v23	50000	5000000						3	0.018
2009-11-10	Sturle Sunde	v21	50000	5000000						3	0.018
2009-11-13	Sturle Sunde	v23	50000	5000000						3	0.018
2009-11-18	ClknGo Software	cngws2	50000	5000000						3	0.018
2009-11-21	ANONYMOUS	v23	50000	5000000						3	0.018
2009-11-25	ANONYMOUS	v23	50000	5000000						3	0.018
2009-11-28	Sturle Sunde	v21	50000	5000000						3	0.018
2009-12-01	Sturle Sunde	v23	50000	5000000						3	0.018
2009-12-04	Sturle Sunde	v23	50000	5000000						3	0.018
2009-12-08	Sturle Sunde	v23	50000	5000000						3	0.018
2009-12-10	Sturle Sunde	v21	50000	5000000						3	0.018
2009-12-14	Sturle Sunde	v23	50000	5000000						3	0.018
2009-12-22	Sturle Sunde	v21	50000	5000000						3	0.018
2009-12-29	ANONYMOUS	v23	50000	5000000						3	0.018
2010-01-05	Sturle Sunde	v23	50000	5000000						3	0.018
2010-01-09	Sturle Sunde	v23	50000	5000000						3	0.018
2010-01-13	Sturle Sunde	v23	50000	5000000						3	0.018
2010-01-16	ANONYMOUS	v23	50000	5000000						3	0.018
2010-01-20	Sturle Sunde	v23	50000	5000000						3	0.018
2010-01-23	Sturle Sunde	v21	50000	5000000						3	0.018
2010-01-27	Sturle Sunde	v23	50000	5000000						3	0.018
2010-01-29	Sturle Sunde	v21	50000	5000000						3	0.018
2010-02-03	Dmitry B. Khachaturov	dix-dubna	50000	5000000						3	0.018
2010-02-04	Sturle Sunde	v23	50000	5000000						3	0.018
2010-02-08	Sturle Sunde	v23	50000	5000000						3	0.018
2010-02-11	ANONYMOUS	v23	50000	5000000						3	0.018
2010-02-16	Sturle Sunde	v23	50000	5000000						3	0.018
2010-02-16	Sturle Sunde	v21	50000	5000000						3	0.018
2010-02-18	Sturle Sunde	v23	50000	5000000						3	0.018
2010-02-24	Sturle Sunde	v21	50000	5000000						3	0.018
2010-03-05	Sturle Sunde	v21	50000	5000000						3	0.018
2010-03-11	Sturle Sunde	v21	50000	5000000						3	0.018
2010-04-14	James Hintz	NEW_OMFG	50000	5000000						3	0.018
2010-04-14	Sturle Sunde	v21	50000	5000000						3	0.018
2010-04-14	Sturle Sunde	v21	50000	5000000						3	0.018
2010-04-14	James Hintz	NEW_OMFG	50000	5000000						11	0.066
2010-04-14	Sturle Sunde	v21	50000	5000000						3	0.018
2010-04-14	Sturle Sunde	v23	50000	5000000						3	0.018
2010-04-14	Sturle Sunde	v23	50000	5000000						3	0.018
2010-04-14	Sturle Sunde	v21	50000	5000000						3	0.018
2010-04-14	Sturle Sunde	v21	50000	5000000						3	0.018
2010-05-01	Sturle Sunde	v23	250000	25000000						3	0.090
2010-05-15	Sturle Sunde	v21	250000	25000000						3	0.090
2010-05-28	Sturle Sunde	v21	250000	25000000						3	0.090
2010-06-09	ANONYMOUS	v23	250000	25000000						3	0.090
2010-07-16	Andrew B	dell_laptop	250000	25000000						3	0.090
2010-08-05	ANONYMOUS	v23	250000	25000000						3	0.090
2010-09-03	Sturle Sunde	v23	250000	25000000						3	0.090
2010-09-28	BOM	C2Q-2667	250000	25000000						3	0.090
2010-10-16	Sturle Sunde	v21	250000	25000000						3	0.090
2010-11-09	Sturle Sunde	v23	250000	25000000						3	0.090
2010-11-29	Sturle Sunde	v21	250000	25000000						3	0.090
2010-12-19	David Bessell	T413	250000	25000000						3	0.090
2011-01-31	Sturle Sunde	v23	250000	25000000						3	0.090
2011-02-22	Sturle Sunde	v21	250000	25000000						3	0.090
2011-03-23	Sturle Sunde	v21	250000	25000000						3	0.090
2011-04-20	WileECoyote	boobuni	250000	25000000						3	0.090
2011-04-26	Sturle Sunde	v21	250000	25000000						3	0.090
2011-05-18	Sturle Sunde	001CC4F0E683	250000	25000000						3	0.090
2011-06-01	Sturle Sunde	001CC4F0E683	250000	25000000						3	0.090
2011-07-04	David Bessell	T413	250000	25000000						3	0.090
2011-09-07	Sturle Sunde	001CC4F0E47D	250000	25000000						3	0.090
2011-10-03	David Bessell	T413	250000	25000000						3	0.090
2011-11-04	David Bessell	T413	250000	25000000						3	0.090
2011-12-10	Sturle Sunde	v21	250000	25000000						3	0.090
2012-01-30	Sturle Sunde	v21	250000	25000000						3	0.090
2012-03-07	David Bessell	T413	250000	25000000						3	0.090
2012-04-19	Sturle Sunde	v21	250000	25000000						3	0.090
2012-06-09	Jacques MOLNE	SR_Hadden	250000	25000000						3	0.090
2012-10-20	David Bessell	T413	250000	25000000						3	0.090
2013-03-05	Sturle Sunde	v23	250000	25000000						3	0.090
2013-10-20	Richard B. Woods	Puttputt	250000	25000000						10	0.299
2015-11-19	Bruce	Desk8	250000	25000000						3	0.090
2015-11-24	Bruce	Desk8	250000	25000000						3	0.090
2015-11-29	Bruce	Desk8	250000	25000000						3	0.090
2015-12-03	Bruce	Desk7	250000	25000000						3	0.090
2015-12-08	Bruce	Desk7	250000	25000000						3	0.090
2015-12-14	Bruce	Desk8	250000	25000000						3	0.090
2015-12-27	XZT	Tablet	250000	25000000						3	0.090
2016-01-05	XZT	Tablet	250000	25000000						3	0.090
2016-01-14	Bruce	Desk8	250000	25000000						3	0.090
2016-01-24	jagr2808	ubuntu	250000	25000000						3	0.090
2016-02-01	Bruce	Desk8	250000	25000000						3	0.090
2016-03-09	lettp	Home	250000	25000000						3	0.090
2016-03-17	curtisc	wcm424--19l	250000	25000000						3	0.090
2016-03-25	pfummel	work4	250000	25000000						3	0.090
2016-06-06	thelegendarymudkip	i5-4670k	250000	25000000						3	0.090
2016-07-11	WileECoyote	S107B	250000	25000000						3	0.090
2016-07-20	WileECoyote	S107B	250000	25000000						3	0.090
2016-07-25	WileECoyote	S107B	250000	25000000						3	0.090
2016-07-30	WileECoyote	S107B	250000	25000000						3	0.090
2016-08-04	WileECoyote	S107B	250000	25000000						3	0.090
2016-08-09	WileECoyote	S107B	250000	25000000						3	0.090
2016-08-21	WileECoyote	S107B	250000	25000000						3	0.090
2016-08-26	WileECoyote	S107B	250000	25000000						3	0.090
2016-08-31	WileECoyote	S107B	250000	25000000						3	0.090
2016-09-05	WileECoyote	S107B	250000	25000000						3	0.090
2016-09-10	WileECoyote	S107B	250000	25000000						3	0.090
2016-09-17	WileECoyote	S107B	250000	25000000						3	0.090
2016-09-22	WileECoyote	S107B	250000	25000000						3	0.090
2016-09-27	WileECoyote	S107B	250000	25000000						3	0.090
2016-10-02	WileECoyote	S107B	250000	25000000						3	0.090
2016-10-07	WileECoyote	S107B	250000	25000000						3	0.090
2016-10-12	WileECoyote	S107B	250000	25000000						3	0.090
2016-10-18	WileECoyote	S107B	250000	25000000						3	0.090
2016-10-24	WileECoyote	S107B	250000	25000000						3	0.090
2016-10-29	WileECoyote	S107B	250000	25000000						3	0.090
2016-11-03	WileECoyote	S107B	250000	25000000						3	0.090
2016-11-10	WileECoyote	S107B	250000	25000000						3	0.090
2016-11-14	WileECoyote	S107B	250000	25000000						3	0.090
2016-11-19	WileECoyote	S107B	250000	25000000						3	0.090
2016-11-24	WileECoyote	S107B	250000	25000000						3	0.090
2016-11-29	WileECoyote	S107B	250000	25000000						3	0.090
2016-12-04	WileECoyote	S107B	250000	25000000						3	0.090
2017-08-06	lycorn	pulsar	250000	25000000						100	2.991
2017-11-01	Anton Repko	Manual testing	250000	25000000						254	7.598
2020-01-26	nordi	nordiputer	1000000	100000000						100	11.97
2022-08-19	Anton Repko	DeskMini	1000000	2842011315						700	847.4

0M	<	10¹⁰	All tracked exponents
0M	<	2³²	GPU TF range
0M	<	1000M	PrimeNet range
0M	<	193M	low-PrimeNet, low-res
0M	<	385M	low-PrimeNet, high-res
50M	<	146M	PrimeNet wavefront

date	userid	compid	res64	spent (GHz-days)
1997-01-01	Brian J. Beesley	samson	63ED50877C06A391	0.001
2001-10-13	ANONYMOUS	v4_computers	63ED50877C06A391	0.001