13 381 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
49300715543	11	35.5	old

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	1381 / 9201

Estimated T-Level: 40.8 ⓘ

TF below 2^130 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	10BE5E1461C66A0B	1	0	1	3
Verified	2017-10-12	kkmrkkblmbrbk	10BE5E1461C66A0B	1	3023	1	3
Unverified	2020-04-17	Oliver Kruse	FD3CC866A9E9FE__	1	2731	5	3

History

Date	User	Type	Result
2023-12-19	-Anonymous-	NF-PM1	B1=100000000000, B2=122154521813133810
2023-05-18	JacobZ	NF-PM1	B1=8200000000, B2=35024272926292650
2020-04-17	Oliver Kruse	C-PRP	M13381/49300715543 : FD3CC866A9E9FE__ PRP without proof (small exponent)
2017-10-12	kkmrkkblmbrbk	C-PRP	M13381/49300715543 : 10BE5E1461C66A0B PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M13381/49300715543 : 10BE5E1461C66A0B PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M13381/49300715543 : 10BE5E1461C66A0B PRP without proof (not generated)