2 571 287 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 1 known prime factor. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁶³

Factored

Factor	Digits	Bits	Date
2021031583	10	30.9	old

ECM

Digits	B1	Curves
25	50000	156 / 280

Estimated T-Level: 22.8 ⓘ

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)	2017-10-15	Oliver Kruse	4D160D10C1181AE2	1	82422	5	3
Verified	PRP without proof (not generated)	2017-12-01	storm5510	4D160D10C1181AE2	1	1044043	5	3

History

Date	User	Type	Result
2022-09-01	USAFSS	NF-PM1	B1=300000, B2=258641460
2017-12-01	storm5510	C-PRP	M2571287/2021031583 : 4D160D10C1181AE2
2017-10-15	Oliver Kruse	C-PRP	M2571287/2021031583 : 4D160D10C1181AE2

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