is 2 15157393 - 1
has 4562830 decimal digits
takes 7.602 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L3E43007A06926A6Fdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27263.093566.6667%17000021675000.20282.2354%63.296367.4118%
Target2697.876565.2174%10000026000000.17182.9979%8.048266.2601%
Difference+3+55.2171+1.4493%+70000-432500+0.0310-0.7625%+55.2481+1.1517%

Known prime factors (1 factor, 87.9 bits, 0.00057981% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
151573932855185551885558548767003212787.8849418458543251991120
24 × 32 × 5 × 11467 × 106487 × 10712749
2022-11-29106487107127493,705,9850.49770.7927

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-03-16ANONYMOUSv4_computers1700002167500---0.203--2.235%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-11-29ATHec2-P_110000002900000027P-12787.8842.193


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-12-31Net_Forcev4_computers21257--0.001--
2000-12-31Net_Forcev4_computers21258--0.003--
2001-02-25ANONYMOUSv4_computers21265--0.481--
2014-05-14NesowaManual testing265266--0.493--
2014-05-14NesowaManual testing266267--0.986--
2017-12-24ramgeisManual testing267268--1.972--
2017-12-24ramgeisManual testing268269--3.944--
2021-07-01lycornManual testing269270--7.888--
2021-09-02SRBaseManual testing270271--15.78--
2021-10-15-Anonymous-Manual testing271272--31.55--


ECM factoring results:
Total ECM effort:0.763 GHz-days
Estimated T-Level:0.192
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.763


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-04-20ANONYMOUSv4_computers3E43007A06926A6F7.602
2006-10-01gabumbv4_computers3E43007A06926A6F7.602
2006-11-28ANONYMOUSv4_computers3E43007A06926A6F7.602


PRP results:
No PRP results for M15157393


P-1 factor-bounds graph:
B1 = 1000000, B2 = 29000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 170000, B2 = 2167500 (P-1 stage 2)
B1 = 170000 (P-1 stage 1)
104
105
106
104
105
106
107
108
TF factor-bounds graph:
272
271
270
269
268
267
266
265
258
257
250
260
270
280
290
2100
Last modified: 2022-11-29T17:26:37+00:00