2 495 861 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
14975167	8	23.8	old
51893322938473	14	45.6	2014-01-23 13:33:09

ECM

Digits	B1	Curves
25	50000	163 / 280

Estimated T-Level: 22.9 ⓘ

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	8C2011E0781C28C6	2	546361	5	3
Verified	PRP without proof (not generated)	2017-11-30	storm5510	8C2011E0781C28C6	2	1337877	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	M2495861/14975167/51893322938473 : 8C2011E0781C28C6
2017-10-14	Oliver Kruse	C-PRP	M2495861/14975167/51893322938473 : 8C2011E0781C28C6
2014-01-23	TJAOI	F	Factor: 51893322938473

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