is 2 25015531 - 1
has 7530426 decimal digits
takes 21.437 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2671.187862.6866%----1.187862.6866%0.0000%
PrimeNet2660.590462.1212%11000040000000.40004.9779%0.990464.0068%1.8856%
GPU722709.552164.2857%18000050000000.55003.6606%10.102165.5931%1.3073%
Difference-3-8.3643-1.5991%-180000-5000000-0.5500-3.6606%-8.9142-2.9065%-2.9065%

Known prime factors (2 factors, 120.2 bits, 0.00048051% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
250155316427309325134989111859.15712846637805
5 × 89 × 97 × 297617
2001-12-01972976170.00470.02030.0376
2501553123786743940269599131961.04547543951676
22 × 3 × 13 × 53 × 149 × 38593
2016-03-29149385930.02000.00280.0049

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
25015531152884761141892988896555773596615474337120.202
P-1 results:
No P-1 results for M25015531


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-12-01T00:00:00Mattv4_computers??59.157180.00244.260.003
2001-08-12T00:00:00Net_Forcev4_computers21256--0.000--
2001-08-24T00:00:00Mattv4_computers21258--0.002--
2022-06-24T05:50:27LordJuliusManual testing2126159.157180.00544.260.010
2016-03-29T11:09:23TJAOIManual testing261262*61.045190.00844.240.016


ECM factoring results:
No ECM results for M25015531


Lucas-Lehmer results:
No L-L results for M25015531


PRP results:
No PRP results for M25015531


P-1 factor-bounds graph:
100
101
102
103
100
101
102
103
104
105
106
TF factor-bounds graph:
267
262
261
258
256
2
250
260
270
280
290
2100
Last modified: 2022-06-24T05:50:27+00:00