is 2 1481483 - 1
has 445971 decimal digits
takes 0.057 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L737D6656E886FD8Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26720.056968.6567%500000150000000.07144.9410%20.128370.2054%1.5487%
PrimeNet2570.013063.1579%65001000000.00062.3346%0.013664.0180%0.8601%
GPU722610.207365.5738%6000500000.00050.9453%0.207865.8992%0.3254%
Difference+6+19.8495+3.0829%+494000+14950000+0.0710+3.9957%+19.9205+4.3062%+4.3062%

Known prime factors (1 factor, 69.3 bits, 0.00467972% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14814837416194318763296212332169.329250296301704552
23 × 3 × 1465727 × 7115249
2014-08-2714657277115249132.150.09820.1651

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers20000270000---0.002--0.963%
2010-12-18T11:21:00Rob_Deetwopc100000200000---0.006--1.221%
2010-12-19T12:32:00Rob_Deetwopc200000300000---0.011--1.524%
2010-12-20T11:46:00Rob_Deetwopc2000001000000---0.013--2.340%
2010-12-21T11:48:00Rob_Deetwopc2000002000000---0.017--2.828%
2010-12-22T11:36:00Rob_Deetwopc2000003000000---0.020--3.120%
2010-12-23T11:58:00Rob_Deetwopc2000004000000---0.023--3.330%
2010-12-24T12:21:00Rob_Deetwopc2000005000000---0.026--3.495%
2016-03-17T19:14:54alpertronManual testing5000001500000012---0.071--4.941%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-14T00:00:00ANONYMOUSv4_computers21257--0.013--
2003-07-30T00:00:00ANONYMOUSv4_computers21258--0.026--
2010-05-06T08:20:00Architects Cubedm1_f2260261--0.104--
2011-04-05T20:59:00GrunwalderGIMPManual testing21263--1.077--


ECM factoring results:

Old Calculation Method

Total ECM effort:11.927 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:11.927 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025011.88
50000500000010.048


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-21T00:00:00ANONYMOUSv4_computers737D6656E886FD8C0.057


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T06:31:15Oliver KruseGTX-3
741619431876329621233
BE0A1FB4197417__no
2017-11-05T01:09:32kkmrkkblmbrbkc4.xlarge
741619431876329621233
BE0A1FB4197417__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 200000, B2 = 5000000 (P-1 stage 2)
B1 = 200000, B2 = 4000000 (P-1 stage 2)
B1 = 200000, B2 = 3000000 (P-1 stage 2)
B1 = 200000, B2 = 2000000 (P-1 stage 2)
B1 = 200000, B2 = 1000000 (P-1 stage 2)
B1 = 200000, B2 = 300000 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
B1 = 100000, B2 = 200000 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 20000, B2 = 270000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
TF factor-bounds graph:
267
263
261
258
257
250
260
270
280
290
2100
Last modified: 2019-05-03T14:21:14+00:00