6 606 191 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
47973309178836922926289	23	75.3	2017-01-02 20:48:29

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)	2000-07-25	NeX	B24C4A78D715C787	4967508
Verified (Factored)	2001-07-29	Barry Hansen	B24C4A78D715C787	6343659

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-12-27	pew	AC9B8A3C73428A24	1	5324371	5	3
Verified	2018-11-05	Oliver Kruse	AC9B8A3C73428A24	1	905762	5	3

History

Date	User	Type	Result
2018-11-05	Oliver Kruse	C-PRP	M6606191/47973309178836922926289 : AC9B8A3C73428A24 PRP: Verified PRP without proof (not generated)
2017-12-27	pew	C-PRP	M6606191/47973309178836922926289 : AC9B8A3C73428A24 PRP: Verified PRP without proof (not generated)
2017-01-02	bam	F-ECM	Factor: 47973309178836922926289 / (ECM curve 3, B1=50000, B2=5000000)
2016-03-29	Gordon Spence	NF	no factor from 2^66 to 2^67
2015-11-04	snme2pm1	NF	no factor from 2^65 to 2^66
2014-07-07	lycorn	NF	no factor from 2^64 to 2^65
2014-06-29	Nesowa	NF	no factor from 2^63 to 2^64
2012-07-03	Nesowa	NF-PM1	B1=80000, B2=1340000, E=6