42 168 977 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

No factors below 2⁷³

TF target 2⁷²

P-1

B1 =	380000
B2 =	1900000

Status	Date	User	Residue	Shift
Verified	2008-08-07	Gregory Cook	49DDDF1552635FE2	13691833
Verified	2016-04-01	Gerald	49DDDF1552635FE2	17989774

History

Date	User	Type	Result
2022-05-04	RichD0	NF	no factor from 2^72 to 2^73
2016-04-01	Gerald	C-LL	49DDDF1552635FE2
2015-09-25	AirSquirrels	NF	no factor from 2^71 to 2^72
2015-03-13	Mark Rose	NF	no factor from 2^70 to 2^71
2015-01-20	chalsall	NF	no factor from 2^69 to 2^70

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