is 2 1799261 - 1
has 541632 decimal digits
takes 0.098 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L0D47A254F63EE913double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26716.514568.6567 %500000150000000.10155.0582 %16.616070.2421 %
Target2610.170765.5738 %90006500000.00351.5542 %0.174266.1088 %
Difference+6+16.3438+3.0829 %+491000+14350000+0.0980+3.5040%+16.4418+4.1333 %

Known prime factors (1 factor, 61.4 bits, 0.00341220% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
179926130307001973314560871961.394842206938663
3 × 280735646221
2008-09-0832807356462210.17071,203.22,247.2

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-03-16alpertronManual testing5000001500000012---8.848%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-01-25ANONYMOUSv4_computers212580.021


ECM factoring results:
Total ECM effort:38.645 GHz-days
Estimated T-Level:25.714
DigitsB1CompleteFacMiss
201100014.7080.000%
25500001.67318.766%
302500000.14386.697%
3510000000.01099.015%


ECM Summary

B1B2factorcurvesGHz-days
10.155
50000500000025517.58
250000400000004920.91


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-07-12ANONYMOUSv4_computers0D47A254F63EE9130.098


PRP results:
dateuseridcompidcofactorsres64
2017-10-03Oliver KruseGTX-3
3030700197331456087
FE45CF16E7F9B918
2017-11-05kkmrkkblmbrbkc4.xlarge
3030700197331456087
FE45CF16E7F9B918


CERT results:
No CERT results for M1799261


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
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106
100
101
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105
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109
1010
1011
1012
TF factor-bounds graph:
258
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.71 ~= 69-bit
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Last modified: 2024-03-03T02:29:32+00:00