618 083 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
20185320995915482480395601	26	84.1	2011-08-06 02:09:53

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	214 / 640

Estimated T-Level: 26.7 ⓘ

TF below 2^84 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	3939	0
Verified (Factored)		Brian J. Beesley	3D10057E98B47939	0
Verified (Factored)		Richard McKay	3D10057E98B47939	0

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-27	Oliver Kruse	1801DC13AFD3F3B9	1	0	1	3
Verified	2017-10-13	Oliver Kruse	1801DC13AFD3F3B9	1	192484	1	3
Verified	2017-12-15	ATH	1801DC13AFD3F3B9	1	373236	1	3
Unverified (Reliable)	2020-04-19	Oliver Kruse	8A942DF5D36A63__	1	383078	5	3

History

Date	User	Type	Result
2023-01-07	USAFSS	NF-PM1	B1=1750000, B2=5399784390
2020-04-19	Oliver Kruse	C-PRP	M618083/20185320995915482480395601 : 8A942DF5D36A63__ PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-12-15	ATH	C-PRP	M618083/20185320995915482480395601 : 1801DC13AFD3F3B9 PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-10-13	Oliver Kruse	C-PRP	M618083/20185320995915482480395601 : 1801DC13AFD3F3B9 PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-09-27	Oliver Kruse	C-PRP	M618083/20185320995915482480395601 : 1801DC13AFD3F3B9 PRP: Unverified (Reliable) PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=1000000, B2=30000000, E=12
2011-08-06	Lukasz Wrobel	F-ECM	Factor: 20185320995915482480395601
2011-07-10	Joss	NF-PM1	B1=371971
2010-12-26	Sid & Andy	NF	no factor from 2^60 to 2^61
2008-10-11	Sturle Sunde	NF	no factor from 2^59 to 2^60
2008-10-11	Sturle Sunde	NF	no factor from 2^58 to 2^59