38 296 163 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 2⁷⁶

TF target 2⁷¹

P-1

B1 =	435000
B2 =	11201250

Status	Date	User	Residue	Shift	Software
Verified	2007-07-04	EDNY	59B8BA66A5FE07EC	21252608	Windows,Prime95,v22,NT service,(aka WY5)
Verified	2016-12-08	Dubslow	59B8BA66A5FE07EC	26405355	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2020-12-31	-anonymous-	NF	no factor TF: 75-76
2020-12-28	-anonymous-	NF	no factor TF: 74-75
2020-02-21	-anonymous-	NF	no factor TF: 73-74
2019-10-25	-anonymous-	NF	no factor TF: 71-72
2019-10-25	-anonymous-	NF	no factor TF: 72-73
2016-12-08	Dubslow	C-LL	59B8BA66A5FE07EC
2014-12-03	Tim Sorbera	NF	no factor TF: 70-71
2014-11-20	Denial140	NF	no factor TF: 69-70
2007-07-04	-anonymous-	C-LL	59B8BA66A5FE07EC
2007-04-23	-anonymous-	NF-PM1	B1=435000, B2=11201250
2007-04-23	-anonymous-	NF	no factor TF: 1-69
2006-07-10	Wayne	NF	no factor TF: 1-68
2003-09-14	-anonymous-	NF	no factor TF: 1-59
2003-09-09	-anonymous-	NF	no factor TF: 1-60