2 668 247 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
379252200277647607567	21	68.4	2010-07-22 06:14:34

ECM

Digits	B1	Curves
25	50000	4 / 280

Estimated T-Level: 20.1 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Steffen Haugk	9EC8FFEFB7E4C469	0
Verified (Factored)	1999-05-16	Jakob Keis Hansen	9EC8FFEFB7E4C469	2442096

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-18	Oliver Kruse	64E75732ADC770FB	1	566635	5	3
Verified	2017-12-03	kkmrkkblmbrbk	64E75732ADC770FB	1	1323888	5	3

History

Date	User	Type	Result
2022-03-11	LordJulius	NF	no factor from 2^1 to 2^60
2019-07-04	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-12-03	kkmrkkblmbrbk	C-PRP	M2668247/379252200277647607567 : 64E75732ADC770FB PRP: Verified PRP without proof (not generated)
2017-10-18	Oliver Kruse	C-PRP	M2668247/379252200277647607567 : 64E75732ADC770FB PRP: Verified PRP without proof (not generated)
2010-07-22	SubPrime	F-ECM	Factor: 379252200277647607567
2009-01-31	Sturle Sunde	NF	no factor from 2^60 to 2^61