7 897 621 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
2891614952499131857	19	61.3	old

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2018-06-05	_p95holder_	190FECB2EC0FB2B0	1	1480561	5	3
Verified	2019-11-12	arnaud	190FECB2EC0FB2B0	1	1813007	5	3

History

Date	User	Type	Result
2024-02-02	Stef42	NF-PM1	B1=950000, B2=1968826860
2019-11-12	arnaud	C-PRP	M7897621/2891614952499131857 : 190FECB2EC0FB2B0 PRP: Verified PRP without proof (not generated)
2018-06-05	_p95holder_	C-PRP	M7897621/2891614952499131857 : 190FECB2EC0FB2B0 PRP: Verified PRP without proof (not generated)

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