13 723 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
158795749393	12	37.2	old

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	1524 / 9201

Estimated T-Level: 40.8 ⓘ

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	CB3CFF4A4FA8267A	1	0	1	3
Verified	No proof (small exponent)	2017-10-12	kkmrkkblmbrbk	CB3CFF4A4FA8267A	1	2829	1	3
Verified	No proof (small exponent)	2020-04-17	Oliver Kruse	1B28AF4A7E38D4E9	1	2586	5	3
Verified	No proof (small exponent)	2024-07-01	kkmrkkblmbrbk	1B28AF4A7E38D4E9	1	2210	5	3

History

Date	User	Type	Result
2025-02-22	masser	NF-PP1	Start=182/17, B1=430000000, B2=429570000000
2025-02-11	masser	NF-PP1	Start=2/7, B1=430000000, B2=429570000000
2025-01-24	masser	NF-PP1	Start=6/5, B1=430000000, B2=429570000000
2024-07-01	kkmrkkblmbrbk	C-PRP	M13723/158795749393 : 1B28AF4A7E38D4E9
2024-01-29	-anonymous-	NF-PM1	B1=100000000000, B2=122154521813133810
2023-05-21	JacobZ	NF-PM1	B1=8000000000, B2=35524619698317750
2022-03-04	Ethan O'Connor	NF-PM1	B1=1000000000, B2=248016220902450
2022-02-06	ANONYMOUS	NF-PM1	B1=50000
2020-04-17	Oliver Kruse	C-PRP	M13723/158795749393 : 1B28AF4A7E38D4E9
2017-10-12	kkmrkkblmbrbk	C-PRP	M13723/158795749393 : CB3CFF4A4FA8267A
2017-09-21	Oliver Kruse	C-PRP	M13723/158795749393 : CB3CFF4A4FA8267A
2017-09-21	Oliver Kruse	C-PRP	M13723/158795749393 : CB3CFF4A4FA8267A