39 919 097 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 =	480000
B2 =	12720000

Status	Date	User	Residue	Shift	Software
Verified	2008-02-03	MesseR	D3066CD71369FAEE	688344	Windows,Prime95,v24 final,(aka Wc1)
Verified	2017-04-28	Dubslow	D3066CD71369FAEE	38538459	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2024-05-21	James Heinrich	NF	no factor TF: 68-69
2020-02-01	-anonymous-	NF	no factor TF: 73-74
2019-10-18	-anonymous-	NF	no factor TF: 72-73
2019-03-15	monst	NF	no factor TF: 71-72
2017-04-28	Dubslow	C-LL	D3066CD71369FAEE
2014-12-21	chalsall	NF	no factor TF: 70-71
2014-12-19	VictordeHollander	NF	no factor TF: 69-70
2012-10-07	Carsten Kossendey	NF	no factor TF: 68-69
2008-02-03	-anonymous-	C-LL	D3066CD71369FAEE
2008-02-03	-anonymous-	NF-PM1	B1=480000, B2=12720000
2006-11-28	-anonymous-	NF	no factor TF: 1-68