is 2 151080151 - 1
has 45479658 decimal digits
takes 881.301 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
Actual27425.323462.1622 %100000010000008.45832.2674 %33.781863.0201 %
Target277202.595563.6364 %100000018000000090.94754.2488 %293.543065.1814 %
Difference-3-177.2721-1.4742 %--179000000-82.4892-1.9814 %-259.7613-2.1613 %

Known prime factors (1 factor, 78.0 bits, 0.00005160% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1510801512947980190628698825411932477.964975634512911196
22 × 3 × 863 × 95287 × 988693
2021-03-1595287988693202.601.21771.6403

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2021-03-15KrieselManual testing1000000100000012477.9648.4581.630%


Trial Factoring results:
575859606162636465666768697071727374757677
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-06-27Richard2632640.013
2011-01-13sasaki3MATE_J2642650.025
2012-01-12Never Odd Or EvenManual testing2652680.346
2012-01-12Never Odd Or EvenManual testing2682690.396
2012-01-12Never Odd Or EvenManual testing2692700.791
2012-01-28Never Odd Or EvenManual testing2702711.583
2012-01-28Never Odd Or EvenManual testing2712723.166
2013-03-08Never Odd Or EvenManual testing2722736.331
2013-03-08Never Odd Or EvenManual testing27327412.66


ECM factoring results:
No ECM results for M151080151


Lucas-Lehmer results:
No L-L results for M151080151


PRP results:
No PRP results for M151080151


CERT results:
No CERT results for M151080151


P-1 factor-bounds graph:
B1 = 1000000 (P-1 stage 1)
103
104
105
106
103
104
105
106
TF factor-bounds graph:
274
273
272
271
270
269
268
265
264
this exponent TF target: 77
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00