79 267 843 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷⁶

TF target 2⁷⁵

P-1

B1 =	665000
B2 =	12967500

Status	Date	User	Residue	Shift	Software
Verified	2018-04-23	Strolling Jellyfish	FCD3966E2A30318E	62367366	Windows 64-bit,Prime95,v29.4,build 7
Verified	2025-11-09	Dt12	FCD3966E2A30318E	28732801	Windows 64-bit,Prime95,v30.19,build 20

History

Date	User	Type	Result
2025-11-09	Dt12	C-LL	FCD3966E2A30318E
2025-08-06	ElectricBill	NF	no factor TF: 75-76
2018-04-23	Strolling Jellyfish	C-LL	FCD3966E2A30318E
2016-09-03	M.A.G.	NF-PM1	B1=665000, B2=12967500
2016-08-07	Brian Beuning	NF	no factor TF: 74-75
2016-08-07	Brian Beuning	NF	no factor TF: 73-74
2016-07-22	CacheOut	NF	no factor TF: 72-73
2016-03-08	ixfd64	NF	no factor TF: 71-72
2014-08-02	Andres Aitsen	NF	no factor TF: 70-71
2012-04-07	Matthew Sheasby	NF	no factor TF: 69-70
2011-04-18	Avernon	NF	no factor TF: 68-69
2011-01-20	Deltron	NF	no factor TF: 67-68
2011-01-18	-anonymous-	NF	no factor TF: 66-67
2011-01-16	runesk	NF	no factor TF: 65-66
2008-06-02	lycorn	NF	no factor TF: 1-65
2004-11-03	-anonymous-	NF	no factor TF: 1-63
2001-09-16	Joss	NF	no factor TF: 1-59
2001-05-13	Joss	NF	no factor TF: 1-58
1999-12-30	-anonymous-	NF	no factor TF: 1-53