39 919 811 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 =	585000
B2 =	585000

Status	Date	User	Residue	Shift	Software
Verified	2009-06-17	ahmerali	4102E4AB60B8265D	20650481	Windows,Prime95,v23,NT service,(aka WZ5)
Verified	2017-04-28	Dubslow	4102E4AB60B8265D	3879242	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2020-02-01	-anonymous-	NF	no factor TF: 73-74
2019-10-18	-anonymous-	NF	no factor TF: 72-73
2019-03-18	monst	NF	no factor TF: 71-72
2017-04-28	Dubslow	C-LL	4102E4AB60B8265D
2014-12-21	chalsall	NF	no factor TF: 70-71
2014-12-19	VictordeHollander	NF	no factor TF: 69-70
2009-06-17	ahmerali	C-LL	4102E4AB60B8265D
2008-03-03	-anonymous-	NF-PM1	B1=585000
2008-03-03	-anonymous-	NF	no factor TF: 1-69
2006-11-28	papalanga	NF	no factor TF: 1-68