38 289 583 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 2⁷¹

P-1

B1 =	430000
B2 =	10105000

Status	Date	User	Residue	Shift	Software
Verified	2010-07-10	Reed_Young	AF200C00F44D0F78	897952	Linux 64-bit,Prime95,v25.9,build 4
Verified	2015-08-25	-anonymous-	AF200C00F44D0F78	5621695	Windows,Prime95,v25.11,build 2

History

Date	User	Type	Result
2020-08-25	Smok_bmv	NF	no factor TF: 74-75
2020-02-21	-anonymous-	NF	no factor TF: 73-74
2019-10-19	-anonymous-	NF	no factor TF: 72-73
2019-10-19	-anonymous-	NF	no factor TF: 71-72
2015-08-25	-anonymous-	C-LL	AF200C00F44D0F78
2014-12-03	NickOfTime	NF	no factor TF: 70-71
2014-11-20	VictordeHollander	NF	no factor TF: 69-70
2010-07-10	Reed_Young	C-LL	AF200C00F44D0F78
2010-03-16	Mr P-1	NF-PM1	B1=430000, B2=10105000
2006-07-10	-anonymous-	NF	no factor TF: 1-69
2003-09-14	-anonymous-	NF	no factor TF: 1-59
2003-09-09	-anonymous-	NF	no factor TF: 1-60