2 638 357 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 3 known prime factors. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁶³

Factored

Factor	Digits	Bits	Date
316602841	9	28.2	old
7472328311831	13	42.8	2008-09-30 14:37:21
29511817127761	14	44.7	2014-01-10 11:41:57

ECM

Digits	B1	Curves
25	50000	93 / 280

Estimated T-Level: 21.7 ⓘ

TF below 2^67 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)	2017-10-18	Oliver Kruse	C7B1E1E52B4B1A07	3	1886436	5	3
Verified	PRP without proof (not generated)	2017-12-02	storm5510	C7B1E1E52B4B1A07	3	201272	5	3

History

Date	User	Type	Result
2019-07-04	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-12-02	storm5510	C-PRP	M2638357/316602841/7472328311831/29511817127761 : C7B1E1E52B4B1A07
2017-10-18	Oliver Kruse	C-PRP	M2638357/316602841/7472328311831/29511817127761 : C7B1E1E52B4B1A07
2014-01-10	TJAOI	F	Factor: 29511817127761
2008-09-30	markr	F	Factor: 7472328311831

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