2 499 151 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
119959249	9	26.8	old
691490090191	12	39.3	2008-07-14 20:24:23

ECM

Digits	B1	Curves
25	50000	201 / 280

Estimated T-Level: 23.6 ⓘ

TF below 2^73 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	B9DE01CD25484CEF	2	1464708	5	3
Verified	PRP without proof (not generated)	2017-11-30	storm5510	B9DE01CD25484CEF	2	913231	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	M2499151/119959249/691490090191 : B9DE01CD25484CEF
2017-10-14	Oliver Kruse	C-PRP	M2499151/119959249/691490090191 : B9DE01CD25484CEF
2008-07-14	George Woltman	F-ECM	Factor: 691490090191

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