39 388 079 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 2⁷⁵

TF target 2⁷²

P-1

B1 =	450000
B2 =	7650000

Status	Date	User	Residue	Shift	Software
Verified	2007-10-17	arnaud	3805381418CEA3E0	26697666	Windows,Prime95,v24 final,(aka Wc1)
Verified	2017-02-17	Dubslow	3805381418CEA3E0	1648474	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2020-12-18	-anonymous-	NF	no factor TF: 74-75
2020-02-21	-anonymous-	NF	no factor TF: 73-74
2019-10-11	-anonymous-	NF	no factor TF: 72-73
2019-06-17	monst	NF	no factor TF: 71-72
2017-02-17	Dubslow	C-LL	3805381418CEA3E0
2014-12-12	Jerry Hallett	NF	no factor TF: 70-71
2014-12-04	Mark Rose	NF	no factor TF: 69-70
2013-09-22	Le Comte	NF	no factor TF: 68-69
2007-10-17	arnaud	C-LL	3805381418CEA3E0
2007-08-14	arnaud	NF-PM1	B1=450000, B2=7650000
2007-01-01	Matt Perry	NF	no factor TF: 1-68
2003-09-29	-anonymous-	NF	no factor TF: 1-60
2003-09-14	-anonymous-	NF	no factor TF: 1-59