15 161 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
11006887	8	23.4	old
107915999	9	26.7	2008-08-26 19:58:44
66862099064513	14	45.9	2008-08-26 19:58:45
482502957615703	15	48.8	2008-08-29 02:24:36
838198274841211441	18	59.5	2008-08-29 02:24:36
535765780861631379161191	24	78.8	2008-08-29 02:24:36

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	3469 / 4588

Estimated T-Level: 38.8 ⓘ

TF below 2^124 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	8D99E4737C812381	6	0	1	3
Verified	2017-10-02	kkmrkkblmbrbk	8D99E4737C812381	6	0	1	3
Verified	2017-12-07	ATH	8D99E4737C812381	6	2335	1	3
Unverified	2020-04-17	Oliver Kruse	085BE0EE8655A7__	6	13207	5	3

P-1 factors

Date	Factor	B1	B2
2024-03-07	535765780861631379161191	100000000000	122154521813133808

History

Date	User	Type	Result
2024-03-07	-Anonymous-	F-PM1	Factor: 535765780861631379161191 / (P-1, B1=100000000000, B2=122154521813133810)
2023-05-28	JacobZ	NF-PM1	B1=7100000000, B2=28019418360433500
2021-08-27	Seth_Tr	NF-PM1	B1=400000000
2020-04-17	Oliver Kruse	C-PRP	M15161/11006887/107915999/66862099064513/482502957615703/838198274841211441/535765780861631379161191 : 085BE0EE8655A7__ PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M15161/11006887/107915999/66862099064513/482502957615703/838198274841211441/535765780861631379161191 : 8D99E4737C812381 PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M15161/11006887/107915999/66862099064513/482502957615703/838198274841211441/535765780861631379161191 : 8D99E4737C812381 PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M15161/11006887/107915999/66862099064513/482502957615703/838198274841211441/535765780861631379161191 : 8D99E4737C812381 PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M15161/11006887/107915999/66862099064513/482502957615703/838198274841211441/535765780861631379161191 : 8D99E4737C812381 PRP without proof (not generated)
2008-08-29	-Anonymous-	F-ECM	Factor: 535765780861631379161191
2008-08-29	-Anonymous-	F-ECM	Factor: 838198274841211441
2008-08-29	-Anonymous-	F	Factor: 482502957615703
2008-08-26	-Anonymous-	F-PM1	Factor: 66862099064513
2008-08-26	-Anonymous-	F	Factor: 107915999