16 771 999 Exponent Status

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

PrimeNet Exponent Status

M_n

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Details

Factored

Factor	Digits	Bits	Date
6527561440560668037991	22	72.5	2017-06-05 22:18:29

ECM

Digits	B1	Curves
25	50000	1 / 280

Estimated T-Level: 20.0 ⓘ

TF below 2^61 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	2002-10-26	Matthew W. Collier	FD7EEB2A36E26E4A	16349857
Verified (Factored)	2006-04-14	Oliver Wurdak	FD7EEB2A36E26E4A	1640453

History

Date	User	Type	Result
2024-03-04	nordi	NF-PM1	B1=500000
2017-06-05	ATH	F-ECM	Factor: 6527561440560668037991 / (ECM curve 1, B1=50000, B2=5000000)
2014-09-16	Nesowa	NF	no factor from 2^66 to 2^67
2014-03-16	Nesowa	NF	no factor from 2^65 to 2^66

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