887 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 4 known prime factors. Cofactor is PRP (Probable-Prime).

Factored

Factor	Digits	Bits	Date
16173559	8	23.9	old
139714099995626040378049	24	76.9	old
2382154297313396649423300881	28	90.9	old
1958905756610480165414360798708208617177953881053051177851547528988145879	73	240.1	2010-02-12 14:30:58

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2024-09-06	George Woltman	PRP_PRP_PRP_PRP_	4	0	1	3

History

Date	User	Type	Result
2024-09-06	George Woltman	P-PRP	M887/16173559/139714099995626040378049/2382154297313396649423300881/1958905756610480165414360798708208617177953881053051177851547528988145879 is a probable prime.
2010-02-12	-Anonymous-	F-ECM	Factor: 1958905756610480165414360798708208617177953881053051177851547528988145879