2 493 563 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
4987127	7	22.2	old
478225486393	12	38.8	2008-07-14 20:24:20

ECM

Digits	B1	Curves
25	50000	168 / 280

Estimated T-Level: 23.0 ⓘ

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)	2017-10-14	Oliver Kruse	BB5EB4599976B597	2	1641925	5	3
Verified	PRP without proof (not generated)	2017-11-30	storm5510	BB5EB4599976B597	2	999376	5	3

History

Date	User	Type	Result
2019-07-04	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-11-30	storm5510	C-PRP	M2493563/4987127/478225486393 : BB5EB4599976B597
2017-10-14	Oliver Kruse	C-PRP	M2493563/4987127/478225486393 : BB5EB4599976B597
2008-07-14	George Woltman	F-ECM	Factor: 478225486393

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