2 507 777 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
42331275761	11	35.3	old
532772208097	12	39.0	2008-07-14 20:24:28

ECM

Digits	B1	Curves
25	50000	131 / 280

Estimated T-Level: 22.3 ⓘ

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	C620407F556C3932	2	1337262	5	3
Verified	PRP without proof (not generated)	2017-11-30	storm5510	C620407F556C3932	2	155849	5	3

History

Date	User	Type	Result
2022-08-20	USAFSS	NF-PM1	B1=240000, B2=199861200
2017-11-30	storm5510	C-PRP	M2507777/42331275761/532772208097 : C620407F556C3932
2017-10-14	Oliver Kruse	C-PRP	M2507777/42331275761/532772208097 : C620407F556C3932
2008-07-14	George Woltman	F-ECM	Factor: 532772208097

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