2 566 199 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
12371604319817	14	43.5	old

ECM

Digits	B1	Curves
25	50000	98 / 280

Estimated T-Level: 21.8 ⓘ

TF below 2^67 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	9AFD76F1E974AF85	1	1437331	5	3
Verified	PRP without proof (not generated)	2017-12-01	storm5510	9AFD76F1E974AF85	1	782973	5	3

History

Date	User	Type	Result
2022-08-30	USAFSS	NF-PM1	B1=480000, B2=423235890
2017-12-01	storm5510	C-PRP	M2566199/12371604319817 : 9AFD76F1E974AF85
2017-10-15	Oliver Kruse	C-PRP	M2566199/12371604319817 : 9AFD76F1E974AF85

Username
Password