M6 969 671 Mersenne number exponent details

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	Trial Factoring	P-1 Factoring	Combined
Limit	GHz-days	Probability	B1	B2	GHz-days	Probability	GHz-days	Probability
Actual	2⁷²	137.2136	68.0556%	2000000	258849360	5.0569	6.9829%	142.2705	70.2862%
Target	2⁶⁷	4.2633	65.6716%	45000	900000	0.0290	2.2389%	4.2923	66.4402%
Difference	+5	+132.9503	+2.3839%	+1955000	+257949360	+5.0280	+4.7440%	+137.9783	+3.8460%

P-1 results:

										GHz-Days		worth	Factor probability
date	userid	compid	b1	b2	e	stage	factor	digits	bits*	spent	saved	worth	Factor probability
2001-09-16	ANONYMOUS	v4_computers	30000	232500		-		-	-	0.013	-	-	0.670%
2011-12-11	James Heinrich	Q6600	135000	2835000		-		-	-	0.089	-	-	2.034%
2020-01-27	takahashi	vaio	600000	12000000	12	-		-	-	0.386	-	-	3.585%
2021-12-07	Seth_Tr	Manual testing	2000000	258849360		-		-	-	5.057	-	-	6.983%

Trial Factoring results:

			Bits		Factor			GHz-Days		worth
date	userid	compid	from	to	factor	bits*	digits	spent	saved	worth
1998-07-11	Mike Curtis	v4_computers	2¹	2⁶²		-	-	0.088	-	-
2004-03-26	Sturle Sunde	v4_computers	2¹	2⁶³		-	-	0.229	-	-
2014-02-09	Nesowa	Manual testing	2⁶³	2⁶⁴		-	-	0.282	-	-
2014-02-15	lycorn	Manual testing	2⁶⁴	2⁶⁵		-	-	0.536	-	-
2015-07-03	VictordeHollander	Manual testing	2⁶⁵	2⁶⁶		-	-	1.072	-	-
2016-04-25	Gordon Spence	Manual testing	2⁶⁶	2⁶⁷		-	-	2.144	-	-
2018-02-27	-Anonymous-	Manual testing	2⁶⁷	2⁶⁸		-	-	4.289	-	-
2020-04-24	TJAOI	Manual testing	2⁶⁸	2⁶⁹		-	-	8.577	-	-
2021-08-07	takahashi	Manual testing	2⁶⁹	2⁷⁰		-	-	17.15	-	-
2021-09-07	SRBase	Manual testing	2⁷⁰	2⁷¹		-	-	34.31	-	-
2021-09-28	SRBase	Manual testing	2⁷¹	2⁷²		-	-	68.62	-	-

ECM factoring results:

Total ECM effort:	1.989 GHz-days
Estimated T-Level:	1.154

Digits	B1	Complete	FacMiss
20	11000	0.231	79.392%
25	50000	0.021	97.887%
30	250000	0.001	99.865%

ECM Summary

B1	B2	factor	curves	GHz-days
50000	5000000		6	1.989

	GHz-Days
date	userid	compid	b1	b2	factor	bits*	curve#	stage#	sigma	numcurves	spent
2012-09-30	LaurV	bc1	50000	5000000						3	0.995
2017-07-20	Bruce	Desk8	50000	5000000						3	0.995

Lucas-Lehmer results:

date	userid	compid	res64	spent (GHz-days)
1999-04-02	ANONYMOUS	v4_computers	C95BFDA573E54B__	1.520
1999-09-22	Michael Kenn	v4_computers	F86CDF7949ED0CC8	1.520
2001-10-13	ANONYMOUS	v4_computers	F86CDF7949ED0CC8	1.520

P-1 factor-bounds graph:

X = B1; Y = B2
size of marker relates to size of factor
mouse-over any factor marker (circle) to see additional info
mouse-over any stage bound text to see additional info

B1 = 2000000, B2 = 258849360 (P-1 stage 2)

B1 = 2000000 (P-1 stage 1)

B1 = 600000, B2 = 12000000 (P-1 stage 2)

B1 = 600000 (P-1 stage 1)

B1 = 135000, B2 = 2835000 (P-1 stage 2)

B1 = 135000 (P-1 stage 1)

B1 = 30000, B2 = 232500 (P-1 stage 2)

B1 = 30000 (P-1 stage 1)

10³

10⁴

10⁵

10⁶

10⁷

10³

10⁴

10⁵

10⁶

10⁷

10⁸

10⁹

TF factor-bounds graph:

2⁷²

2⁷¹

2⁷⁰

2⁶⁹

2⁶⁸

2⁶⁷

2⁶⁶

2⁶⁵

2⁶⁴

2⁶³

2⁶²

this exponent TF target: 67

TF double-checked to: 67.7

ECM T-Level=1.15 ~= -13-bit

2⁵⁰

2⁶⁰

2⁷⁰

2⁸⁰

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