5 561 869 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
189340540128615566777	21	67.4	2015-07-05 16:04:07

ECM

Digits	B1	Curves
25	50000	6 / 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)		Rob Harger	890EF361FC6D5BEE	0
Verified (Factored)	2000-09-23	Waterson	890EF361FC6D5BEE	1771752

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-12-07	Oliver Kruse	E60762E1E52E6D4F	1	4187724	5	3
Verified	2018-04-01	kkmrkkblmbrbk	E60762E1E52E6D4F	1	1384727	5	3

History

Date	User	Type	Result
2018-04-01	kkmrkkblmbrbk	C-PRP	M5561869/189340540128615566777 : E60762E1E52E6D4F PRP: Verified PRP without proof (not generated)
2017-12-07	Oliver Kruse	C-PRP	M5561869/189340540128615566777 : E60762E1E52E6D4F PRP: Verified PRP without proof (not generated)
2015-07-05	Sid & Andy	F-ECM	Factor: 189340540128615566777
2014-12-17	monst	NF	no factor from 2^64 to 2^65
2014-12-16	Nesowa	NF	no factor from 2^63 to 2^64
2010-11-29	Squeeky_Squirrel	NF-PM1	B1=65000, B2=1023750, E=6
2009-06-06	Carsten Kossendey	NF-PM1	B1=30000, B2=390000
2009-02-11	GrunwalderGIMP	NF	no factor from 2^62 to 2^63