is 2 2330387 - 1
has 701517 decimal digits
takes 0.157 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LC03F2F12198C152Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26712.750667.1642%50000005050000003.158210.9828%15.908970.7705%3.6063%
PrimeNet2580.016562.0690%100001900000.00192.9351%0.018463.1823%1.1133%
GPU722620.263664.5161%130002000000.00231.7835%0.265965.1490%0.6329%
Difference+5+12.4870+2.6481%+4987000+504800000+3.1560+9.1992%+15.6430+5.6215%+5.6215%

Known prime factors (2 factors, 154.9 bits, 0.00664719% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2330387453075461804432104918872375.2629721034785304589
3 × 37 × 139 × 1249 × 504443209
2021-04-2012495044432094,142.82.69235.0282
23303879440270443260696603082392479.643202547268828325437
3 × 2137 × 56171 × 562455877
2017-09-125617156245587764,1033.00705.6065

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
23303874277154890639071080298283961353966160722875699347154.905
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-21T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.285%
2010-02-22T08:14:00Budannan50000010000000---0.100--4.828%
2018-03-18T01:19:45alpertronManual testing5000001500000012---0.126--5.218%
2021-04-20T09:41:11ViliamF350000005050000002375.2623.1580.3156.31610.983%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:12Mark RoseManual testing21260--0.066--
2009-01-17T12:35:00Sturle Sundeklengel.ifi260261--0.066--
2012-05-27T12:42:00Sebastian HornbostelManual testing261262--0.132--
2013-01-23T08:26:00dbaughManual testing262263--0.421--
2015-03-03T21:35:00VictordeHollanderManual testing263264--0.842--
2015-03-03T21:35:00VictordeHollanderManual testing264265--1.603--
2015-10-25T20:35:17ramgeisManual testing265266--3.207--
2017-06-06T00:53:14Gordon SpenceManual testing266267--6.413--


ECM factoring results:

Old Calculation Method

Total ECM effort:2.571 GHz-days
Estimated T-Level:1.450
DigitsB1CurvesCompleteFacMiss
201100029 / 1000.29074.717%
255000029 / 2800.10490.144%

New Calculation Method

Total ECM effort:2.571 GHz-days
Estimated T-Level:1.450
DigitsB1CompleteFacMiss
20110000.93539.240%
25500000.08591.893%
302500000.00599.481%


ECM Summary

B1B2factorcurvesGHz-days
500005000000272.393
50000500000020.177


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2015-11-15T01:35:40MadPooManual testingC03F2F12198C152D0.157


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-28T13:10:14alpertronManual testing
944027044326069660308239
841B1FE1D05808__no
2017-10-31T06:13:18Oliver KruseGTX-0
944027044326069660308239
841B1FE1D05808__no
2021-04-20T10:00:06mikrNitron
45307546180443210491887
944027044326069660308239
77450EFB783813__no
2021-04-21T03:44:46marssystemssystem11
45307546180443210491887
944027044326069660308239
77450EFB78381349no


P-1 factor-bounds graph:
B1 = 5000000, B2 = 505000000 (P-1 stage 2)
B1 = 5000000 (P-1 stage 1)
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000, B2 = 10000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
TF factor-bounds graph:
267
266
265
264
263
262
261
260
250
260
270
280
290
2100
Last modified: 2021-04-21T03:44:46+00:00