877 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 5 known prime factors. Cofactor is PRP (Probable-Prime).

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
35081	5	15.1	old
1436527	7	20.5	old
1839699736969340949026772071177	31	100.5	old
4478527345975241075738524755872079528958635991	46	151.6	old
91383457962725757106767895106859156848543968186689599951801167598113823	71	235.7	2009-09-27 18:12:11

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Factored	No proof (small exponent)	2024-09-06	George Woltman	PRP_PRP_PRP_PRP_	5	0	1	3

History

Date	User	Type	Result
2024-09-06	George Woltman	P-PRP	M877/35081/1436527/1839699736969340949026772071177/4478527345975241075738524755872079528958635991/91383457962725757106767895106859156848543968186689599951801167598113823 PRP Cofactor
2009-09-27	-anonymous-	F-ECM	Factor: 91383457962725757106767895106859156848543968186689599951801167598113823
2005-03-20	-anonymous-	F-PM1	Factor: 1839699736969340949026772071177
2002-12-09	Gerry Snyder	F-ECM	Factor: 4478527345975241075738524755872079528958635991