2 521 307 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
132996182309459921	18	56.9	old
18782805156572523851089	23	74.0	2024-03-01 03:19:32

ECM

Digits	B1	Curves
25	50000	37 / 280

Estimated T-Level: 20.7 ⓘ

TF below 2^64 is very unlikely to find new factors due to ECM effort.

Status		Date	User	Residue	Number of known factors	Shift	Type	Base
composite	Verified (Factored)	2017-10-14	Oliver Kruse	C438D7E8BE466167	1	1422404	5	3
composite	Verified (Factored)	2017-12-01	kkmrkkblmbrbk	C438D7E8BE466167	1	160767	5	3
composite	Verified	2024-03-01	Anton Tsvetkov	C438D7E8BE466167	2	211389	5	3

History

Date	User	Type	Result
2024-03-01	Tom Kayser	CERT	PRP Certification Proof certified good
2024-03-01	Anton Tsvetkov	C-PRP	M2521307/132996182309459921/18782805156572523851089 : C438D7E8BE466167 PRP proof power = 7 PRP: Verified Proof certified good
2024-03-01	Anton Tsvetkov	F-ECM	Factor: 18782805156572523851089 / (ECM curve 25, B1=50000, B2=11242140, Edwards Sigma=4601207643677733)
2022-08-21	USAFSS	NF-PM1	B1=240000, B2=199861200
2017-12-01	kkmrkkblmbrbk	C-PRP	M2521307/132996182309459921 : C438D7E8BE466167 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-14	Oliver Kruse	C-PRP	M2521307/132996182309459921 : C438D7E8BE466167 PRP: Verified (Factored) PRP without proof (not generated)