13 037 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 1 known prime factor. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
190880881390622978067041	24	77.3	old

P-1 factors

Date	Factors	B1	B2
2023-10-10	No new factors discovered	100000000000	122154521813133808

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	1633 / 9201

Estimated T-Level: 40.9 ⓘ

TF below 2^131 is very unlikely to find new factors due to ECM effort.

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	No proof (small exponent)	2017-09-21	Oliver Kruse	7A20AFF19BBED153	1	0	1	3
Verified	No proof (small exponent)	2017-10-12	kkmrkkblmbrbk	7A20AFF19BBED153	1	2770	1	3
Verified	No proof (small exponent)	2020-04-17	Oliver Kruse	2A42C640D9F28B8C	1	7801	5	3
Verified	No proof (small exponent)	2024-07-01	kkmrkkblmbrbk	2A42C640D9F28B8C	1	3381	5	3

History

Date	User	Type	Result
2025-03-10	masser	NF-PP1	Start=198/31, B1=430000000, B2=429570000000
2025-02-01	masser	NF-PP1	Start=6/5, B1=430000000, B2=429570000000
2025-01-31	masser	NF-PP1	Start=2/7, B1=430000000, B2=429570000000
2024-07-01	kkmrkkblmbrbk	C-PRP	M13037/190880881390622978067041 : 2A42C640D9F28B8C
2023-10-10	-anonymous-	F-PM1	Factor: 190880881390622978067041 / B1=100000000000, B2=122154521813133810
2023-05-16	JacobZ	NF-PM1	B1=8500000000, B2=33523232658715800
2022-02-05	Joss	NF-PM1	B1=1000000, B2=3910366209750
2020-04-17	Oliver Kruse	C-PRP	M13037/190880881390622978067041 : 2A42C640D9F28B8C
2017-10-12	kkmrkkblmbrbk	C-PRP	M13037/190880881390622978067041 : 7A20AFF19BBED153
2017-09-21	Oliver Kruse	C-PRP	M13037/190880881390622978067041 : 7A20AFF19BBED153
2017-09-21	Oliver Kruse	C-PRP	M13037/190880881390622978067041 : 7A20AFF19BBED153