2 272 993 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

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

Factored

Factor	Digits	Bits	Date
123815604753051733183	21	66.7	2010-06-15 05:33:11

ECM

Digits	B1	Curves
25	50000	112 / 280

Estimated T-Level: 22.0 ⓘ

TF below 2^68 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Wayne Scott	67FB161FD0855742	0
Verified (Factored)	1999-07-26	Lawrence Ng	67FB161FD0855742	2033182

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-11	Oliver Kruse	FD4C929BCD58675E	1	0	1	3
Verified	2017-11-21	kkmrkkblmbrbk	FD4C929BCD58675E	1	1716154	1	3

History

Date	User	Type	Result
2017-11-21	kkmrkkblmbrbk	C-PRP	M2272993/123815604753051733183 : FD4C929BCD58675E PRP: Verified PRP without proof (not generated)
2017-10-11	Oliver Kruse	C-PRP	M2272993/123815604753051733183 : FD4C929BCD58675E PRP: Verified PRP without proof (not generated)
2016-04-30	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2010-06-15	James Hintz	F-ECM	Factor: 123815604753051733183
2009-01-10	Sturle Sunde	NF	no factor from 2^60 to 2^61