185 161 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
9435389557059054023523169	25	83.0	2009-10-31 06:51:02
5612739372344365406642926508173635967	37	122.1	2017-05-17 01:01:48

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	162 / 1566

Estimated T-Level: 30.5 ⓘ

TF below 2^96 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Amdahl 6 - 1989	215D845F	0
Verified (Factored)		Laurent Hodges	57FD7782215D845F	0
Verified (Factored)		Brian J. Beesley	57FD7782215D845F	0
Verified (Factored)		Eivind Triel	57FD7782215D845F	143472

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-22	Oliver Kruse	D66C05441888549D	2	0	1	3
Verified	2017-10-12	kkmrkkblmbrbk	D66C05441888549D	2	183997	1	3
Verified	2020-04-17	Oliver Kruse	376A3BF48E14CB61	2	120131	5	3
Verified	2023-08-24	USAFSS	376A3BF48E14CB61	2	65968	5	3

P-1 factors

Date	Factor	B1	B2
2017-05-17	5612739372344365406642926508173635967	100000000	2000000000

History

Date	User	Type	Result
2023-08-24	curtisc	CERT	PRP Certification Proof certified good
2023-08-24	USAFSS	C-PRP	M185161/9435389557059054023523169/5612739372344365406642926508173635967 : 376A3BF48E14CB61 PRP proof power = 5 PRP: Verified Proof certified good
2022-03-07	LordJulius	NF	no factor from 2^57 to 2^58
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2020-04-17	Oliver Kruse	C-PRP	M185161/9435389557059054023523169/5612739372344365406642926508173635967 : 376A3BF48E14CB61 PRP: Verified PRP without proof (small exponent)
2017-10-12	kkmrkkblmbrbk	C-PRP	M185161/9435389557059054023523169/5612739372344365406642926508173635967 : D66C05441888549D PRP: Verified PRP without proof (small exponent)
2017-09-22	Oliver Kruse	C-PRP	M185161/known_factors : D66C05441888549D PRP without proof (not generated)
2017-05-17	kkmrkkblmbrbk	F-PM1	Factor: 5612739372344365406642926508173635967 / (P-1, B1=100000000, B2=2000000000, E=12)
2009-10-31	-Anonymous-	F-ECM	Factor: 9435389557059054023523169
2009-01-28	axn	NF-PM1	B1=5000000, B2=200000000, E=12
2009-01-25	Sturle Sunde	NF	no factor from 2^59 to 2^60
2008-12-30	Sturle Sunde	NF	no factor from 2^58 to 2^59