is 2 925019 - 1
has 278459 decimal digits
takes 0.022 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26732.122570.1493 %20000050000000.01623.2756 %32.138771.1271 %
Target2440.000054.5455 %1500030000000.006218.0400 %0.006262.7455 %
Difference+23+32.1225+15.6038 %+185000+2000000+0.0100-14.7644 %+32.1325+8.3816 %

Known prime factors (2 factors, 124.0 bits, 0.01340423% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
9250193226466272011238.231174400
26 × 52 × 109
-641096.923e-82.337e-64.580e-6
925019655356928200187322574450012685.76035423971194115327500
22 × 37 × 54 × 241 × 109717 × 245029
2014-09-131097172450299,571,0070.00410.0079

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2014-09-13alpertronManual testing2000005000000622685.7600.01626.247%


Trial Factoring results:
5758596061626364656667
No TF results for M925019


ECM factoring results:
Total ECM effort:14.117 GHz-days
Estimated T-Level:25.658
DigitsB1CompleteFacMiss
201100014.8080.000%
25500001.62019.795%
302500000.13287.678%
3510000000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002817.918
25000025000000446.199


Lucas-Lehmer results:
No L-L results for M925019


PRP results:
dateuseridcompidcofactorsres64
2017-09-28Oliver KruseGTX-0
322646627201
65535692820018732257445001
71112442E6D9BD85
2017-10-14Oliver KruseThreadripper-PC
322646627201
65535692820018732257445001
71112442E6D9BD85
2017-12-21ATHec2-1xh
322646627201
65535692820018732257445001
71112442E6D9BD85
2020-04-23Oliver KruseAddPrpType5
322646627201
65535692820018732257445001
1466987DCB18D260


CERT results:
No CERT results for M925019


P-1 factor-bounds graph:
B1 = 200000, B2 = 5000000 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
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107
TF factor-bounds graph:
this exponent TF target: 44
TF double-checked to: 67
ECM T-Level=25.66 ~= 69-bit
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Last modified: 2024-03-13T02:15:48+00:00