397 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 8 known prime factors. Cofactor is PRP (Probable-Prime).

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
2383	4	11.2	old
6353	4	12.6	old
50023	5	15.6	old
53993	5	15.7	old
202471	6	17.6	old
5877983	7	22.5	old
814132872808522587940886856743	30	99.4	old
1234904213576000272542841146073	31	100.0	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_	8	0	1	3

History

Date	User	Type	Result
2018-01-02	ATH	P-PRP	M397/2383/6353/50023/53993/202471/5877983/814132872808522587940886856743/1234904213576000272542841146073 PRP Cofactor

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