2 561 099 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
614663761	9	29.2	old

ECM

Digits	B1	Curves
25	50000	181 / 280

Estimated T-Level: 23.2 ⓘ

TF below 2^72 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	E1B247523626DF75	1	1458958	5	3
Verified	PRP without proof (not generated)	2017-12-01	storm5510	E1B247523626DF75	1	224546	5	3

History

Date	User	Type	Result
2022-08-27	USAFSS	NF-PM1	B1=480000, B2=446264910
2017-12-01	storm5510	C-PRP	M2561099/614663761 : E1B247523626DF75
2017-10-15	Oliver Kruse	C-PRP	M2561099/614663761 : E1B247523626DF75

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