2 470 397 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 2 known prime factors. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁶³

Factored

Factor	Digits	Bits	Date
14822383	8	23.8	old
31398745871	11	34.9	2008-07-14 20:24:07

ECM

Digits	B1	Curves
25	50000	162 / 280

Estimated T-Level: 22.9 ⓘ

TF below 2^71 is very unlikely to find new factors due to ECM effort.

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2017-10-13	Oliver Kruse	BD65BAFE5125DA55	2	425850	5	3
Verified	PRP without proof (not generated)	2017-11-29	storm5510	BD65BAFE5125DA55	2	2008413	5	3

History

Date	User	Type	Result
2018-09-28	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-11-29	storm5510	C-PRP	M2470397/14822383/31398745871 : BD65BAFE5125DA55
2017-10-13	Oliver Kruse	C-PRP	M2470397/14822383/31398745871 : BD65BAFE5125DA55
2008-07-14	George Woltman	F-ECM	Factor: 31398745871

Username
Password