is 2 3060601 - 1
has 921333 decimal digits
takes 0.260 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L6301862A543DCF8Fdouble-checked
PRP20F71FDAE42605D6verified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26819.474967.6471%32465282185052107416.230813.4711%35.705772.0054%4.3583%
PrimeNet2600.050263.3333%120002200000.00292.5244%0.053164.2590%0.9256%
GPU722641.163065.6250%140002200000.00311.4659%1.166166.1289%0.5039%
Difference+4+18.3119+2.0221%+32451282+1850301074+16.2277+12.0052%+34.5396+5.8765%+5.8765%

Known prime factors (1 factor, 79.3 bits, 0.00258991% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
30606017272161352860964075106972479.267118802832398946548
22 × 1013 × 152293 × 192520693
2021-03-2415229319252069370,7241.31222.4177

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2004-02-07T00:00:00ANONYMOUSv4_computers2048204800---0.002--0.249%
2010-09-26T01:48:00markrtiny1100002447500---0.029--2.666%
2016-03-05T01:32:12Squeeky_SquirrelP4_260019500054112506---0.059--3.508%
2017-11-13T21:18:09mikrMSI300000010000000012---1.022--8.038%
2022-02-06T12:04:24Jocelyn LaroucheManual testing1000000119912100---0.923--7.471%
2022-03-21T06:46:14oodairacom5324652821850521074122479.26716.230.52132.4613.471%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-06-09T00:00:00ANONYMOUSv4_computers21260--0.050--
2009-02-13T05:42:00Sturle Sundegimo.ifi260261--0.050--
2011-10-06T02:22:00Sid & AndyBuzz261262--0.100--
2013-01-07T13:54:00dbaughManual testing262263--0.321--
2015-02-07T18:28:00VictordeHollanderManual testing263264--0.641--
2015-02-07T18:28:00VictordeHollanderManual testing264265--1.221--
2015-06-06T19:31:00ThaManual testing265266--2.442--
2017-05-09T09:30:26Gordon SpenceManual testing266267--4.883--
2022-01-20T22:38:00Jocelyn LaroucheManual testing267268--9.77--
2018-07-30T10:12:18ramgeisManual testing267268--9.77--


ECM factoring results:

Old Calculation Method

Total ECM effort:6.176 GHz-days
Estimated T-Level:2.650
DigitsB1CurvesCompleteFacMiss
201100053 / 1000.53058.704%
255000053 / 2800.18982.727%

New Calculation Method

Total ECM effort:6.176 GHz-days
Estimated T-Level:2.650
DigitsB1CompleteFacMiss
20110002.03813.023%
25500000.18982.811%
302500000.01298.817%


ECM Summary

B1B2factorcurvesGHz-days
500005000000505.827
50000500000030.350


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-11-17T00:00:00ANONYMOUSv4_computers6301862A543DCF8F0.260
1999-12-23T00:00:00ANONYMOUSv4_computers6301862A543DCF8F0.260


PRP results:
dateuseridcompidcofactorsres64PRP
2021-03-25T03:25:45rbanovccg_srvcmp
727216135286096407510697
20F71FDAE42605D6no


P-1 factor-bounds graph:
B1 = 32465282, B2 = 1850521074 (P-1 stage 2)
B1 = 32465282 (P-1 stage 1)
B1 = 3000000, B2 = 100000000 (P-1 stage 2)
B1 = 1000000, B2 = 119912100 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
B1 = 195000, B2 = 5411250 (P-1 stage 2)
B1 = 110000, B2 = 2447500 (P-1 stage 2)
B1 = 195000 (P-1 stage 1)
B1 = 110000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
102
103
104
105
106
107
108
102
103
104
105
106
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109
1010
TF factor-bounds graph:
268
267
266
265
264
263
262
261
260
250
260
270
280
290
2100
Last modified: 2022-03-21T06:46:14+00:00