is 2 1924751 - 1
has 579408 decimal digits
takes 0.104 GHz-days to do one PRP test
Last-known PrimeNet details:
-unknown- L-L tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26715.437868.6567%50000005300000002.643310.8683%18.081172.0632%8.9053%
PrimeNet2570.010063.1579%90001700000.00143.0942%0.011464.2979%1.1400%
GPU722610.159665.5738%110001700000.00151.8138%0.161166.1982%0.6244%
Difference+6+15.2782+3.0829%+4989000+529830000+2.6418+9.0545%+17.9200+5.8650%+5.8650%

Known prime factors (2 factors, 99.8 bits, 0.00518421% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1924751265615639927.98569
3 × 23
-3239.428e-123.217e-74.803e-7
192475141064647756430022982572271.7981066752212531128
23 × 19 × 43 × 263 × 620577121
2021-05-07263620577121275.712.65974.9675

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
192475110907412654134076913300016412233199.783
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T19:19:03alpertronManual testing5000001500000012---0.101--5.099%
2021-05-07T22:34:00happy5214Manual testing5000000530000000---2.643--10.868%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-05-07T23:39:13happy5214Manual testing2500000250000027P+12271.7980.299


Trial Factoring results:
Exponent "1924751" not found


ECM factoring results:
Total ECM effort:1.389 GHz-days
Estimated T-Level:1.000
DigitsB1CurvesCompleteFacMiss
201100020 / 1000.20081.791%
255000020 / 2800.07193.094%

ECM Summary

B1B2factorcurvesGHz-days
500005000000201.389


Lucas-Lehmer results:
Exponent "1924751" not found


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-04T23:32:26Oliver KruseGTX-1
265615639
33235ACE3F4754__no
2017-11-10T04:20:56ATHec2-1xf
265615639
33235ACE3F4754__no
2021-05-08T15:12:02ThomRuley
265615639
4106464775643002298257
6C0E8125CAFB10__no
2021-05-09T12:17:17marssystemssystem11
265615639
4106464775643002298257
6C0E8125CAFB10A8no


P-1 factor-bounds graph:
B1 = 5000000, B2 = 530000000 (stage 2)
B1 = 5000000 (stage 1)
B1 = 500000, B2 = 15000000 (stage 2)
B1 = 500000 (stage 1)
100
101
102
103
104
105
106
107
100
101
102
103
104
105
106
107
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109
TF factor-bounds graph:
267
220
230
240
250
260
270
280
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2100
Last modified: 2021-05-09T12:17:17+00:00