2 428 651 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 1 known prime factor. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁶³

Factored

Factor	Digits	Bits	Date
641174030333087	15	49.2	old

ECM

Digits	B1	Curves
25	50000	209 / 280

Estimated T-Level: 23.7 ⓘ

TF below 2^74 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	FB61234BD2F6C175	1	1624673	5	3
Verified	PRP without proof (not generated)	2017-11-27	storm5510	FB61234BD2F6C175	1	796372	5	3

History

Date	User	Type	Result
2018-09-28	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-11-27	storm5510	C-PRP	M2428651/641174030333087 : FB61234BD2F6C175
2017-10-13	Oliver Kruse	C-PRP	M2428651/641174030333087 : FB61234BD2F6C175

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