is 2 5210281 - 1
has 1568451 decimal digits
takes 0.823 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- L-L tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2675.702965.6716%25000002400000003.535410.2188%9.238369.1796%3.5079%
PrimeNet2620.117962.9032%220005000000.01103.0038%0.128964.0175%1.1143%
GPU722662.834565.1515%300006000000.01401.9879%2.848565.8443%0.6927%
Difference+1+2.8685+0.5201%+2470000+239400000+3.5214+8.2309%+6.3898+3.3353%+3.3353%

Known prime factors (3 factors, 167.7 bits, 0.00321842% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
52102811405525402571237.03213488
24 × 3 × 281
-162816.745e-96.970e-67.456e-6
52102813524010411773588391858.29033817853699
7 × 59 × 97 × 233 × 3623
2015-08-2523336230.01299.564e-50.0001
521028160880938652948750243992272.366584238533900079
3 × 47 × 380591 × 10887109
2021-08-1538059110887109225.630.21820.2537

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
5210281495308615266894428954822816232995.322
521028185569705809025265704262430473054333109.399
5210281214545061691540499023482942633650331276140130.656
521028130154853420340794505343955482868959789545431431957
7
51167.689
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2021-08-15T12:41:37happy5214Manual testing25000002400000002272.3663.5351.6467.07110.219%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-08-15T12:41:37happy5214Manual testing12500008500000027P-12272.3661.459


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2015-08-25T11:06:00TJAOIManual testing25825958.290180.0061.7730.012


ECM factoring results:
Exponent "5210281" not found


Lucas-Lehmer results:
Exponent "5210281" not found


PRP results:
dateuseridcompidcofactorsres64PRP
2017-11-24T05:07:14Oliver KruseGTX-0
140552540257
352401041177358839
139528A74BB80D__no
2018-01-22T00:05:12kkmrkkblmbrbkc4.xlarge
140552540257
352401041177358839
139528A74BB80D__no
2021-08-15T13:21:22happy5214Manual testing
140552540257
352401041177358839
6088093865294875024399
139528A74BB80D34no


P-1 factor-bounds graph:
B1 = 2500000, B2 = 240000000 (P-1 stage 2)
B1 = 1250000, B2 = 85000000 (P-1 stage 2)
B1 = 2500000 (P-1 stage 1)
B1 = 1250000 (P-1 stage 1)
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109
TF factor-bounds graph:
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260
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2100
Last modified: 2021-08-15T13:21:22+00:00