2 532 991 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
40527857	8	25.3	old
178591063447	12	37.4	2008-07-14 20:24:45

ECM

Digits	B1	Curves
25	50000	132 / 280

Estimated T-Level: 22.4 ⓘ

TF below 2^69 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	A8228D70F2AEC5BD	2	1581079	5	3
Verified	PRP without proof (not generated)	2017-12-01	storm5510	A8228D70F2AEC5BD	2	2107711	5	3

History

Date	User	Type	Result
2019-07-04	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-12-01	storm5510	C-PRP	M2532991/40527857/178591063447 : A8228D70F2AEC5BD
2017-10-14	Oliver Kruse	C-PRP	M2532991/40527857/178591063447 : A8228D70F2AEC5BD
2008-07-14	George Woltman	F-ECM	Factor: 178591063447

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