is 2 982939 - 1
has 295895 decimal digits
takes 0.024 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L8CDEF267A33FECC5double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26730.229770.1493%1000000300000000.09075.7750%30.320471.8731%1.7239%
PrimeNet2400.000050.0000%90004000000.001124.0060%0.001162.0030%12.0030%
GPU722440.000054.5455%160006500000.001818.4436%0.001862.9289%8.3834%
Difference+23+30.2297+15.6038%+984000+29350000+0.0889-12.6686%+30.3186+8.9442%+8.9442%

Known prime factors (1 factor, 64.8 bits, 0.00659356% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
982939323564730090965153112064.81116459044258645
32 × 5 × 47 × 7782054023
2008-02-054777820540234.941714.90827.845

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-07-22T00:00:00ANONYMOUSv4_computers550001200000---0.004--1.821%
2002-04-28T00:00:00ANONYMOUSv4_computers163841638400---0.004--1.326%
2002-08-03T00:00:00ANONYMOUSv4_computers327683276800---0.007--1.980%
2003-01-25T00:00:00ANONYMOUSv4_computers655366553600---0.015--2.774%
2003-09-14T00:00:00ANONYMOUSv4_computers13107213107200---0.029--3.696%
2016-03-17T18:55:18alpertronManual testing20000050000006---0.016--3.303%
unknown100000030000000---0.091--5.775%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-07-03T00:00:00ANONYMOUSv4_computers21255--0.005--
2000-10-28T00:00:00ANONYMOUSv4_computers21256--0.010--
2001-12-01T00:00:00ANONYMOUSv4_computers21257--0.020--
2003-08-08T00:00:00ANONYMOUSv4_computers21258--0.039--


ECM factoring results:

Old Calculation Method

Total ECM effort:14.191 GHz-days
Estimated T-Level:25.344
DigitsB1CurvesCompleteFacMiss
2011000324 / 1003.2403.853%
2550000324 / 2801.15731.373%
3025000044 / 6400.06993.351%

New Calculation Method

Total ECM effort:14.191 GHz-days
Estimated T-Level:25.344
DigitsB1CompleteFacMiss
201100014.7690.000%
25500001.61619.866%
302500000.13187.697%
3510000000.00999.130%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
5000050000002807.947
25000025000000446.244


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-01-08T00:00:00Mattv4_computers8CDEF267A33FECC50.024


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-28T14:26:22Oliver KruseGTX-2
32356473009096515311
9B22155FDC7AA1__no
2017-10-16T01:03:48kkmrkkblmbrbkc4.xlarge
32356473009096515311
9B22155FDC7AA1__no
2020-04-24T21:50:32Oliver KruseAddPrpType5
32356473009096515311
272B48DFDC1724__no


P-1 factor-bounds graph:
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 131072, B2 = 13107200 (P-1 stage 2)
B1 = 200000, B2 = 5000000 (P-1 stage 2)
B1 = 65536, B2 = 6553600 (P-1 stage 2)
B1 = 32768, B2 = 3276800 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
B1 = 131072 (P-1 stage 1)
B1 = 55000, B2 = 1200000 (P-1 stage 2)
B1 = 16384, B2 = 1638400 (P-1 stage 2)
B1 = 65536 (P-1 stage 1)
B1 = 55000 (P-1 stage 1)
B1 = 32768 (P-1 stage 1)
B1 = 16384 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
258
257
256
255
250
260
270
280
290
2100
Last modified: 2020-04-24T21:50:32+00:00