68 434 943 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

TF

No factors below 2⁷⁶

TF target 2⁷⁴

P-1

B1 =	625000
B2 =	12812500

Status	Date	User	Residue	Shift
Verified	2016-03-17	curtisc	EF46A4507455A3BD	12374054
Verified	2024-02-13	aas236_tpu	EF46A4507455A3BD	4604288

History

Date	User	Type	Result
2024-02-13	aas236_tpu	C-LL	EF46A4507455A3BD
2020-06-13	-Anonymous-	NF	no factor from 2^75 to 2^76
2016-03-17	curtisc	C-LL	EF46A4507455A3BD
2016-01-16	ktony	NF	no factor from 2^74 to 2^75
2014-09-14	TheJudger	NF-PM1	B1=625000, B2=12812500, E=12
2014-08-31	TheJudger	NF	no factor from 2^73 to 2^74
2014-08-31	TheJudger	NF	no factor from 2^72 to 2^73
2014-07-24	RichD0	NF	no factor from 2^71 to 2^72
2012-08-07	Clown_Royal	NF	no factor from 2^70 to 2^71
2012-03-06	GrunwalderGIMP	NF	no factor from 2^69 to 2^70
2010-10-29	trif	NF	no factor from 2^68 to 2^69
2010-10-09	trif	NF	no factor from 2^67 to 2^68
2010-09-21	fsweb	NF	no factor from 2^66 to 2^67
2010-09-19	-Anonymous-	NF	no factor from 2^65 to 2^66
2010-09-18	-Anonymous-	NF	no factor from 2^64 to 2^65
2008-10-27	1997rj7	NF	no factor to 2^64