10 987 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
197767	6	17.6	old
1955739723753776762466229965124230239	37	120.6	2012-12-04 01:17:14

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	3027 / 9201

Estimated T-Level: 41.6 ⓘ

TF below 2^133 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-21	Oliver Kruse	726ABF16134273D4	2	0	1	3
Verified	2017-10-02	kkmrkkblmbrbk	726ABF16134273D4	2	0	1	3
Verified	2017-10-12	kkmrkkblmbrbk	726ABF16134273D4	2	8078	1	3
Unverified	2020-04-17	Oliver Kruse	3B0EC8D5DE0011__	2	10065	5	3

History

Date	User	Type	Result
2022-12-29	-Anonymous-	NF-PM1	B1=100000000000, B2=122192573512709700
2020-04-17	Oliver Kruse	C-PRP	M10987/197767/1955739723753776762466229965124230239 : 3B0EC8D5DE0011__ PRP without proof (small exponent)
2017-10-12	kkmrkkblmbrbk	C-PRP	M10987/197767/1955739723753776762466229965124230239 : 726ABF16134273D4 PRP without proof (not generated)
2017-10-02	kkmrkkblmbrbk	C-PRP	M10987/197767/1955739723753776762466229965124230239 : 726ABF16134273D4 PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M10987/197767/1955739723753776762466229965124230239 : 726ABF16134273D4 PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M10987/197767/1955739723753776762466229965124230239 : 726ABF16134273D4 PRP without proof (not generated)
2016-09-07	kkmrkkblmbrbk	NF-PM1	B1=100000000, B2=10000000000, E=12
2012-12-04	SRJ2877	F-ECM	Factor: 1955739723753776762466229965124230239