is 2 2017403 - 1
has 607299 decimal digits
takes 0.133 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26714.728868.6567%500000150000000.12305.1284%14.851870.2641%1.6074%
PrimeNet2580.019063.7931%90001500000.00162.6113%0.020664.7386%0.9455%
GPU722620.304566.1290%80001200000.00131.2730%0.305966.5602%0.4312%
Difference+5+14.4243+2.5277%+492000+14880000+0.1216+3.8554%+14.5459+3.7039%+3.7039%

Known prime factors (4 factors, 187.1 bits, 0.00927238% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2017403149287823927.15437
37
-1378.934e-122.823e-73.725e-7
2017403161392241927.26640
23 × 5
2008-07-15888.940e-127.627e-71.552e-6
20174032775391910708846631857.94568786254177
97 × 709136641
2015-07-29977091366410.01533.68346.8796
2017403306090201843989830075612374.6967586243349593260
22 × 5 × 11 × 23 × 1499257578971
2022-06-242314992575789712,799.57,787.514,545

11 Composite Factors:
exponentprime factorscomposite factordigitsbits*
2017403240938963079813431754.420
2017403414332216321534100233586492685.099
2017403447926720122572656140997832685.211
2017403456955398749198273661277422970331101.850
2017403494005836237438510571118973420131101.962
2017403668700049106291649946171470884240934112.365
201740373749055841181706339524838215881593442339129.116
2017403849520270145047464567254659118468793694340132.642
2017403126823031724326030216915085146403305304058174508949159.795
2017403137105980173634605357877324652820763102889745926349159.908
201740320468253300403072231341641698483842532829135178360
4454449
57187.061
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T19:19:36alpertronManual testing5000001500000012-
skipped known factor: 149287823
skipped known factor: 161392241
--0.123--5.128%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-07-15T07:49:00J FeitsmaManual testing??27.26697.67360e-140.2881.66878e-13
2015-07-29T11:18:00TJAOIManual testing257258*57.945180.0060.2690.012


ECM factoring results:

Old Calculation Method

Total ECM effort:3.989 GHz-days
Estimated T-Level:2.250
DigitsB1CurvesCompleteFacMiss
201100045 / 1000.45063.619%
255000045 / 2800.16185.129%

New Calculation Method

Total ECM effort:3.989 GHz-days
Estimated T-Level:2.250
DigitsB1CompleteFacMiss
20110001.77616.937%
25500000.16484.845%
302500000.01098.966%


ECM Summary

B1B2factorcurvesGHz-days
50000470000040.330
500005000000272.286
50000675000070.677
50000713563670.695


Lucas-Lehmer results:
No L-L results for M2017403


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-05T23:00:08Oliver KruseGTX-2
149287823
161392241
277539191070884663
82B1182D18E93A__no
2017-11-13T21:59:28kkmrkkblmbrbkc4.xlarge
149287823
161392241
277539191070884663
82B1182D18E93A__no
2022-07-07T11:49:59matzetoni
149287823
161392241
277539191070884663
30609020184398983007561
6D4378AA272766__no
2022-07-21T06:51:56some-studentsGIMPS_IN_SHANGHAI
149287823
161392241
277539191070884663
30609020184398983007561
6D4378AA27276696no
2022-07-27T13:34:06Ember_EdisonMainServer
149287823
161392241
277539191070884663
30609020184398983007561
6D4378AA27276696no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
TF factor-bounds graph:
267
258
2
220
230
240
250
260
270
280
290
2100
Last modified: 2022-07-27T13:34:06+00:00