38 925 109 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 =	465000
B2 =	11741250

Status	Date	User	Residue	Shift	Software
Verified	2010-01-08	Rick	1EC3CE876F99D160	29737467	Windows 64-bit,Prime95,v25.9,build 4
Verified	2015-11-27	Dubslow	1EC3CE876F99D160	5486615	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2020-11-16	-anonymous-	NF	no factor TF: 74-75
2020-02-28	-anonymous-	NF	no factor TF: 73-74
2019-10-18	-anonymous-	NF	no factor TF: 72-73
2019-04-29	monst	NF	no factor TF: 71-72
2015-11-27	Dubslow	C-LL	1EC3CE876F99D160
2014-12-07	megavink	NF	no factor TF: 70-71
2014-12-07	megavink	NF	no factor TF: 69-70
2013-09-02	Torben K.	NF	no factor TF: 68-69
2010-01-08	Rick	C-LL	1EC3CE876F99D160
2009-12-21	Rick	NF-PM1	B1=465000, B2=11741250
2006-08-14	-anonymous-	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