958 933 Exponent Status

PrimeNet Exponent Status

M_n

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁶⁸

TF target 2⁴⁴

P-1

B1 =	10000000
B2 =	98817648930

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	252 / 1566

Estimated T-Level: 30.8 ⓘ

TF below 2^97 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift	Software
Verified		Cornelius Caesar	F10EEBA981531804	0	Windows 16-bit,Prime95,v11,(aka WB)
Verified		Brian J. Beesley	F10EEBA981531804	672330	Windows,Prime95,v20,(aka WW1)
Verified	2016-06-01	MadPoo 🙂	F10EEBA981531804	400516	Windows 64-bit,Prime95,v26,(aka We4)

History

Date	User	Type	Result
2025-06-05	Joss	NF-PM1	B1=10000000, B2=98817648930
2025-06-05	Joss	NF-PM1	B1=10000000, B2=88111713690
2025-06-05	Joss	NF-PM1	B1=10000000, B2=77405778450
2025-06-05	Joss	NF-PM1	B1=10000000, B2=66699843210
2025-06-05	Joss	NF-PM1	B1=10000000, B2=55993907970
2025-06-04	Joss	NF-PM1	B1=10000000, B2=45287972730
2025-05-29	Joss	NF-PM1	B1=10000000, B2=34582037490
2025-05-05	Joss	NF-PM1	B1=10000000, B2=13064311260
2024-01-20	Joss	NF-PM1	B1=8096820, B2=76145599530
2024-01-20	Joss	NF-PM1	B1=8096820, B2=36949963050
2024-01-20	Joss	NF-PM1	B1=8096820, B2=17352144810
2023-11-02	Joss	NF-PM1	B1=4048411, B2=10411250850
2023-07-14	Joss	NF-PM1	B1=1000000, B2=207767900340
2023-07-13	Joss	NF-PM1	B1=1000000, B2=102684311730
2023-07-12	Joss	NF-PM1	B1=1000000, B2=50423463090
2023-07-12	Joss	NF-PM1	B1=1000000, B2=24293038770
2022-11-18	masser	NF-PP1	Start=6/5, B1=4000000, B2=172000000
2022-11-16	masser	NF-PP1	Start=2/7, B1=8000000, B2=400000000
2022-11-13	masser	NF-PP1	Start=84/67, B1=2000000, B2=72000000
2022-02-21	Gordon Spence	NF	no factor TF: 67-68
2016-06-05	kkmrkkblmbrbk	NF	no factor TF: 66-67
2016-06-05	kkmrkkblmbrbk	NF	no factor TF: 65-66
2016-06-01	MadPoo 🙂	C-LL	F10EEBA981531804
2016-05-29	kkmrkkblmbrbk	NF-PM1	B1=100000000, B2=10000000000, E=12
2016-02-23	Mark Rose	NF	no factor TF: 58-60
2015-04-01	snme2pm1	NF	no factor TF: 64-65
2015-04-01	snme2pm1	NF	no factor TF: 63-64
2015-04-01	snme2pm1	NF	no factor TF: 62-63
2014-09-04	alpertron	NF-PM1	B1=10000000, B2=500000000, E=12
2013-12-11	lycorn	NF	no factor TF: 61-62
2013-10-23	David Campeau	NF-PM1	B1=850000, B2=25500000, E=12
2012-02-06	Joss	NF-PM1	B1=701573
2011-09-19	Joss	NF-PM1	B1=350786
2011-07-14	Joss	NF-PM1	B1=210472
2011-06-05	Joss	NF-PM1	B1=200000
2010-05-18	Architects Cubed	NF	no factor TF: 60-61
2003-09-21	-anonymous-	NF-PM1	B1=131072, B2=13107200, E=12
2003-08-25	-anonymous-	NF	no factor TF: 1-58
2003-01-16	-anonymous-	NF-PM1	B1=65536, B2=6553600, E=12
2002-08-03	-anonymous-	NF-PM1	B1=32768, B2=3276800, E=12
2002-05-25	-anonymous-	NF-PM1	B1=16384, B2=1638400
2002-05-11	Joss	NF-PM1	B1=5000, B2=5000
2002-05-11	Joss	NF-PM1	B1=6000, B2=6000
2002-05-05	-anonymous-	NF-PM1	B1=8192, B2=819200
2002-02-24	-anonymous-	NF-PM1	B1=4096, B2=409600
2002-01-08	-anonymous-	NF-PM1	B1=2000, B2=200000
2001-11-17	-anonymous-	NF	no factor TF: 1-57
2000-11-15	-anonymous-	NF	no factor TF: 1-56
2000-06-28	-anonymous-	NF	no factor TF: 1-55

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