is 2 2947949 - 1
has 887422 decimal digits
takes 0.251 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
Actual26710.079567.1642 %3200002434370401.67427.7366 %11.753769.7046 %
Target2630.541465.0794 %1700015000000.01211.9473 %0.553565.7594 %
Difference+4+9.5381+2.0848 %+303000+241937040+1.6621+5.7893%+11.2002+3.9452 %

Known prime factors (1 factor, 39.9 bits, 0.00135464% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
294794910504072917831339.934178159
163 × 1093
-16310933.882e-82.637e-54.094e-5

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2022-12-04USAFSS6917th_Scty_Sq320000243437040
skipped known factor: 1050407291783
--1.77210.972%


Trial Factoring results:
5758596061626364656667
No TF results for M2947949


ECM factoring results:
Total ECM effort:0.347 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.347


Lucas-Lehmer results:
No L-L results for M2947949


PRP results:
dateuseridcompidcofactorsres64
2017-10-25Oliver KruseGTX-1
1050407291783
6475D70F82D55ABD
2017-12-09kkmrkkblmbrbkc4.xlarge
1050407291783
6475D70F82D55ABD


CERT results:
No CERT results for M2947949


P-1 factor-bounds graph:
B1 = 320000, B2 = 243437040 (P-1 stage 2)
B1 = 320000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
this exponent TF target: 63
TF double-checked to: 67
ECM T-Level=0.58 ~= -15-bit
250
260
270
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Last modified: 2024-03-13T02:15:48+00:00