38 928 209 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 =	400000
B2 =	3300000

Status	Date	User	Residue	Shift	Software
Verified	2007-07-24	C. Cooper / S. Boone	F8C0B4AFBF546B17	112920	Windows,Prime95,v24 final,NT service,(aka Wc5)
Verified	2015-11-27	Dubslow	F8C0B4AFBF546B17	20229806	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
2019-05-01	monst	NF	no factor TF: 71-72
2015-11-27	Dubslow	C-LL	F8C0B4AFBF546B17
2014-12-07	megavink	NF	no factor TF: 70-71
2014-12-07	megavink	NF	no factor TF: 69-70
2013-08-31	Le Comte	NF	no factor TF: 68-69
2007-07-24	curtisc	C-LL	F8C0B4AFBF546B17
2007-07-04	curtisc	NF-PM1	B1=400000, B2=3300000
2007-04-23	Trent Taufer	NF	no factor TF: 1-68
2006-08-25	Trent Taufer	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