68 240 633 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 2⁷⁵

TF target 2⁷⁴

P-1

B1 =	625000
B2 =	12812500

Status	Date	User	Residue	Shift
Verified	2016-01-28	arnaud	5DB23599F12E1FBD	40473740
Verified	2024-02-07	MARSTEC	5DB23599F12E1FBD	54886433

History

Date	User	Type	Result
2024-06-01	LaurV	NF	no factor from 2^70 to 2^71
2024-02-07	MARSTEC	C-LL	5DB23599F12E1FBD
2016-01-28	arnaud	C-LL	5DB23599F12E1FBD
2015-12-26	endless_mike	NF	no factor from 2^74 to 2^75
2014-10-29	David Hruska	NF-PM1	B1=625000, B2=12812500, E=12
2014-08-14	Kevin Jaget	NF	no factor from 2^73 to 2^74
2014-07-30	chalsall	NF	no factor from 2^72 to 2^73
2014-07-09	RichD0	NF	no factor from 2^71 to 2^72
2013-10-11	Carsten Kossendey	NF	no factor from 2^70 to 2^71
2013-05-05	JeffreyH-8	NF	no factor from 2^69 to 2^70
2010-02-20	David Young	NF	no factor from 2^68 to 2^69
2010-02-10	sannerud.com	NF	no factor from 2^67 to 2^68
2010-01-29	ANONYMOUS	NF	no factor from 2^66 to 2^67
2010-01-21	steinrar	NF	no factor from 2^65 to 2^66
2010-01-20	-Anonymous-	NF	no factor from 2^64 to 2^65
2009-02-09	1997rj7	NF	no factor to 2^64