39 933 337 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 =	640000
B2 =	640000

Status	Date	User	Residue	Shift	Software
Bad	2009-04-10	curtisc	82FDE799AC159553	9247493	Windows Service,Prime95,v25.8,build 1
Verified	2016-01-28	Richard	3F6ABF63E376EE0E	37520909	Linux 64-bit,Prime95,v28.7,build 1
Verified	2016-06-09	-anonymous-	3F6ABF63E376EE0E	11427093	Windows 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2020-01-26	-anonymous-	NF	no factor TF: 73-74
2019-10-18	-anonymous-	NF	no factor TF: 72-73
2019-03-17	monst	NF	no factor TF: 71-72
2016-06-09	-anonymous-	C-LL	3F6ABF63E376EE0E
2016-01-28	Richard	C-LL	3F6ABF63E376EE0E
2014-12-15	Mark Rose	NF	no factor TF: 70-71
2014-12-14	Andrew B	NF	no factor TF: 69-70
2013-10-05	Le Comte	NF	no factor TF: 68-69
2009-04-10	curtisc	C-LL	82FDE799AC159553
2008-04-24	-anonymous-	NF-PM1	B1=640000
2006-11-28	JC_Herles	NF	no factor TF: 1-68