M6 942 361 Mersenne number exponent details

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M6942361

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is 2 ^6942361 - 1

has 2089859 decimal digits

takes 1.514 GHz-days to do one PRP test

Last-known PrimeNet details:

Exponent is not assigned to anyone

0 primality tests remaining

	Residue	Status
L-L	7319D465474F1029	double-checked
PRP	-unknown-	-unknown-

	Trial Factoring			P-1 Factoring				Combined
	Limit	GHz-days	Probability	B1	B2	GHz-days	Probability	GHz-days	Probability
Actual	2⁷²	137.7534	68.0556%	2000000	258849360	5.0569	6.9801%	142.8103	70.2853%
Target	2⁶⁷	4.2801	65.6716%	45000	900000	0.0290	2.2375%	4.3090	66.4397%
Difference	+5	+133.4733	+2.3839%	+1955000	+257949360	+5.0280	+4.7426%	+138.5013	+3.8456%

Known prime factors:
No known factors for M6942361

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	MadPoo	v4_computers	30000	270000		-		-	-	0.014	-	-	0.705%
2011-11-28	James Heinrich	Q6600	130000	2827500		-		-	-	0.088	-	-	2.015%
2020-01-18	takahashi	vaio	600000	12000000	12	-		-	-	0.386	-	-	3.583%
2021-12-06	Seth_Tr	Manual testing	2000000	258849360		-		-	-	5.057	-	-	6.980%

Trial Factoring results:

			Bits		Factor			GHz-Days		worth
date	userid	compid	from	to	factor	bits*	digits	spent	saved	worth
1998-07-05	ANONYMOUS	v4_computers	2¹	2⁶²		-	-	0.088	-	-
1998-07-21	ANONYMOUS	v4_computers	2¹	2⁶²		-	-	0.088	-	-
1998-07-29	ANONYMOUS	v4_computers	2¹	2⁶²		-	-	0.088	-	-
1998-08-16	ANONYMOUS	v4_computers	2¹	2⁶²		-	-	0.088	-	-
1998-10-04	ANONYMOUS	v4_computers	2¹	2⁶²		-	-	0.088	-	-
2005-03-06	ANONYMOUS	v4_computers	2¹	2⁶³		-	-	0.230	-	-
2014-02-09	Nesowa	Manual testing	2⁶³	2⁶⁴		-	-	0.283	-	-
2014-02-16	lycorn	Manual testing	2⁶⁴	2⁶⁵		-	-	0.538	-	-
2015-06-26	VictordeHollander	Manual testing	2⁶⁵	2⁶⁶		-	-	1.076	-	-
2016-04-05	Gordon Spence	Manual testing	2⁶⁶	2⁶⁷		-	-	2.153	-	-
2018-05-23	ramgeis	Manual testing	2⁶⁷	2⁶⁸		-	-	4.306	-	-
2020-04-24	TJAOI	Manual testing	2⁶⁸	2⁶⁹		-	-	8.611	-	-
2021-07-28	takahashi	Manual testing	2⁶⁹	2⁷⁰		-	-	17.22	-	-
2021-08-10	SRBase	Manual testing	2⁷⁰	2⁷¹		-	-	34.44	-	-
2021-09-25	SRBase	Manual testing	2⁷¹	2⁷²		-	-	68.89	-	-

ECM factoring results:

Total ECM effort:	2.984 GHz-days
Estimated T-Level:	1.731

Digits	B1	Complete	FacMiss
20	11000	0.346	70.740%
25	50000	0.032	96.848%
30	250000	0.002	99.798%

ECM Summary

B1	B2	factor	curves	GHz-days
50000	5000000		9	2.984

	GHz-Days
date	userid	compid	b1	b2	factor	bits*	curve#	stage#	sigma	numcurves	spent
2012-08-25	vichico	HP-ROMA	50000	5000000						3	0.995
2017-04-12	Yxinity	Elena	50000	5000000						3	0.995
2017-04-12	Yxinity	Manual testing	50000	5000000						3	0.995

Lucas-Lehmer results:

date	userid	compid	res64	spent (GHz-days)
1999-04-02	ANONYMOUS	v4_computers	7319D465474F1029	1.514
2001-10-25	MadPoo	v4_computers	7319D465474F1029	1.514

PRP results:
No PRP results for M6942361

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 = 130000, B2 = 2827500 (P-1 stage 2)

B1 = 130000 (P-1 stage 1)

B1 = 30000, B2 = 270000 (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=1.73 ~= -11-bit

2⁵⁰

2⁶⁰

2⁷⁰

2⁸⁰

Last modified: 2023-03-25T13:08:14+00:00

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