2 440 831 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
511227171289	12	38.9	old
611247544007	12	39.2	2008-07-14 20:23:55

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	226 / 640

Estimated T-Level: 26.8 ⓘ

TF below 2^84 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	61347B10AFA1C26C	2	1717573	5	3
Verified	PRP without proof (not generated)	2017-11-27	storm5510	61347B10AFA1C26C	2	2236237	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	M2440831/511227171289/611247544007 : 61347B10AFA1C26C
2017-10-13	Oliver Kruse	C-PRP	M2440831/511227171289/611247544007 : 61347B10AFA1C26C
2008-07-14	George Woltman	F-ECM	Factor: 611247544007

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