is 2 15277601 - 1
has 4599017 decimal digits
takes 7.662 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L5E61A0F21400F97Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2671.944964.1791%30000060000000.44405.1929%2.388966.0393%1.8602%
PrimeNet2650.477563.0769%7000022000000.13534.2900%0.612864.6609%1.5840%
GPU722697.814565.2174%10000026000000.17183.0014%7.986366.2614%1.0440%
Difference-2-5.8696-1.0383%+200000+3400000+0.2722+2.1915%-5.5973-0.2221%-0.2221%

Known prime factors (1 factor, 76.3 bits, 0.00049963% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
15277601950613374708397994892472376.3313111134315879823
3 × 2251 × 75167 × 6129073
2016-12-047516761290731,887.00.29450.4536

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-03-31T00:00:00ANONYMOUSv4_computers225000225000---0.164--1.952%
2016-10-02T00:33:09ThaManual testing300000600000012---0.444--5.193%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-01-08T00:00:00Net_Forcev4_computers21257--0.001--
2001-01-08T00:00:00Net_Forcev4_computers21258--0.003--
2001-02-04T00:00:00ANONYMOUSv4_computers21265--0.478--
2016-03-16T02:28:24Mark RoseManual testing265266--0.489--
2014-05-28T13:19:00NesowaManual testing266267--0.978--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.763 GHz-days
Estimated T-Level:0.050
DigitsB1CurvesCompleteFacMiss
20110001 / 1000.01099.000%
25500001 / 2800.00499.643%

New Calculation Method

Total ECM effort:0.763 GHz-days
Estimated T-Level:0.050
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.763


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-06-09T00:00:00ANONYMOUSv4_computers5E61A0F21400F97D7.662
2006-02-15T00:00:00ebravickv4_computers5E61A0F21400F97D7.662


PRP results:
No PRP results for M15277601


P-1 factor-bounds graph:
B1 = 300000, B2 = 6000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 225000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
TF factor-bounds graph:
267
266
265
258
257
250
260
270
280
290
2100
Last modified: 2016-12-04T18:58:04+00:00