40 095 641 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 2⁷⁴

TF target 2⁷²

P-1

B1 =	475000
B2 =	11400000

Status	Date	User	Residue	Shift	Software
Verified	2009-08-13	andrea.biancalana	1516722951D2DFC8	30741945	Linux 32-bit,Prime95,v24 final,(aka Wc2)
Verified	2017-05-28	Dubslow	1516722951D2DFC8	22069870	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2024-05-21	James Heinrich	NF	no factor TF: 68-69
2020-02-14	-anonymous-	NF	no factor TF: 73-74
2019-09-30	-anonymous-	NF	no factor TF: 72-73
2017-05-28	Dubslow	C-LL	1516722951D2DFC8
2015-01-09	monst	NF	no factor TF: 71-72
2014-12-21	megavink	NF	no factor TF: 70-71
2014-12-21	megavink	NF	no factor TF: 69-70
2012-10-07	Carsten Kossendey	NF	no factor TF: 68-69
2009-08-13	andrea.biancalana	C-LL	1516722951D2DFC8
2007-09-28	mhoney	NF-PM1	B1=475000, B2=11400000
2006-11-28	Team Prime Rib	NF	no factor TF: 1-68
2002-08-31	-anonymous-	NF	no factor TF: 1-57