2 490 679 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
255971160288227311	18	57.8	old
6421516712198935337	19	62.5	2016-08-16 11:09:37

ECM

Digits	B1	Curves
25	50000	167 / 280

Estimated T-Level: 23.0 ⓘ

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)	2017-10-14	Oliver Kruse	624118A11CF51FDC	2	2487221	5	3
Verified	PRP without proof (not generated)	2017-11-30	storm5510	624118A11CF51FDC	2	2018926	5	3

History

Date	User	Type	Result
2019-07-04	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-11-30	storm5510	C-PRP	M2490679/255971160288227311/6421516712198935337 : 624118A11CF51FDC
2017-10-14	Oliver Kruse	C-PRP	M2490679/255971160288227311/6421516712198935337 : 624118A11CF51FDC
2016-08-16	TJAOI	F	Factor: 6421516712198935337

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