is 2 2503841 - 1
has 753732 decimal digits
takes 0.174 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
Actual26711.867367.1642%----11.867367.1642%0.0000%
PrimeNet2590.030762.7119%100001800000.00192.5386%0.032663.6585%0.9466%
GPU722630.637465.0794%110001700000.00201.4079%0.639465.5710%0.4916%
Difference+4+11.2299+2.0848%-11000-170000-0.0020-1.4079%+11.2279+1.5932%+1.5932%

Known prime factors (1 factor, 34.3 bits, 0.00137044% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2503841213527560491134.3144264
23 × 13 × 41
-13411.758e-91.461e-62.661e-6

P-1 results:
No P-1 results for M2503841


Trial Factoring results:
No TF results for M2503841


ECM factoring results:

Old Calculation Method

Total ECM effort:0.552 GHz-days
Estimated T-Level:0.300
DigitsB1CurvesCompleteFacMiss
20110006 / 1000.06094.148%
25500006 / 2800.02197.876%

New Calculation Method

Total ECM effort:0.552 GHz-days
Estimated T-Level:0.300
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000060.552


Lucas-Lehmer results:
No L-L results for M2503841


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:23:35alpertronManual testing
21352756049
FC1DEFE07F10BE__no
2017-11-07T14:46:50Oliver KruseThreadripper
21352756049
FC1DEFE07F10BE__no


P-1 factor-bounds graph:
100
101
102
100
101
102
TF factor-bounds graph:
267
230
240
250
260
270
280
290
2100
Last modified: 2018-09-28T16:57:01+00:00