431 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 7 known prime factors. Cofactor is PRP (Probable-Prime).

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
863	3	9.8	old
3449	4	11.8	old
36238481	8	25.1	old
76859369	8	26.2	old
558062249	9	29.1	old
4642152737	10	32.1	old
142850312799017452169	21	67.0	old

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Factored	No proof (small exponent)	2018-01-02	ATH	PRP_PRP_PRP_PRP_	7	0	1	3

History

Date	User	Type	Result
2018-01-02	ATH	P-PRP	M431/863/3449/36238481/76859369/558062249/4642152737/142850312799017452169 PRP Cofactor

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