is 2 207197 - 1
has 62373 decimal digits
takes 0.001 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L7B59C9260AB622BDdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual267143.409073.1343%14800000069161030838902,520.318324.6315%2,663.727379.7518%6.6174%
PrimeNet2400.000055.0000%2200550000.000012.9498%0.000060.8274%5.8274%
GPU722440.000059.0909%3600800000.00018.9175%0.000162.7390%3.6481%
Difference+23+143.4090+14.0434%+147996400+6916103003890+2,520.3182+15.7140%+2,663.7272+17.0128%+2.9694%

Known prime factors (1 factor, 130.0 bits, 0.06275907% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
207197139446983633120745538220835198277789671140130.0353365082111061471583522464977733215
3 × 5 × 7 × 2154293 × 19566761 × 109191829 × 6962937799
2022-06-0910919182969629377996.689e+113.22674.7374

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-04-29T00:00:00ANONYMOUSv4_computers10000010000000---0.004--2.636%
2002-06-02T00:00:00ANONYMOUSv4_computers327683276800---0.001--1.501%
2002-07-27T00:00:00ANONYMOUSv4_computers655366553600---0.003--2.166%
2003-02-16T00:00:00ANONYMOUSv4_computers13107213107200---0.006--2.960%
2003-10-14T00:00:00ANONYMOUSv4_computers26214426214400---0.011--3.870%
2009-03-15T14:58:00axnManual testing5000000200000000---0.104--7.740%
2015-06-26T20:20:00mikrColorovo500000002550000000---1.245--12.444%
2021-05-28T18:12:09mognutsManual testing10000000300000000---0.173--8.632%
2022-06-09T01:35:35Sid & AndyMagic_8_Ball148000000691610308389040130.0352,5200.0025,04124.632%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-11-17T00:00:00ANONYMOUSv4_computers252253--0.003--
2000-04-12T00:00:00ANONYMOUSv4_computers21254--0.012--
2022-03-07T05:09:04LordJuliusManual testing254255--0.012--
2001-02-04T00:00:00ANONYMOUSv4_computers21256--0.046--
2001-02-11T00:00:00ANONYMOUSv4_computers21256--0.046--
2002-03-16T00:00:00ANONYMOUSv4_computers21257--0.093--
2016-02-23T16:27:59Mark RoseManual testing257258--0.093--
2009-01-01T18:44:00Sturle Sundeagrell.ifi258259--0.185--
2009-02-06T20:10:00Sturle Sundegolan.ifi259260--0.371--
2013-08-04T10:16:00lycornasteroid260261--0.741--
2015-06-08T22:23:00snme2pm1Manual testing261262--1.483--
2016-01-06T11:11:27Gordon SpenceManual testing262263--4.738--
2016-01-06T11:11:27Gordon SpenceManual testing263264--9.476--
2018-02-26T17:30:03Gordon SpenceManual testing264265--18.03--
2019-12-15T13:07:33Gordon SpenceManual testing265266--36.07--
2020-10-29T11:09:54Gordon SpenceManual testing266267--72.13--


ECM factoring results:
Total ECM effort:25.116 GHz-days
Estimated T-Level:30.711
DigitsB1CompleteFacMiss
201100079.9640.000%
255000012.4550.000%
302500001.47222.952%
3510000000.14286.743%
4030000000.01298.836%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002761.348
2500002500000058514.29
1000000100000000979.478


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-12-16T00:00:00ANONYMOUSv4_computers7B59C9260AB622BD0.001


PRP results:
dateuseridcompidcofactorsres64PRP
2022-06-09T03:46:01some-studentsManual testing
1394469836331207455382208351982777896711
B38A0988AB52E7D8no
2022-06-09T18:56:07LordJuliusWhiteBox
1394469836331207455382208351982777896711
B38A0988AB52E7D8no


P-1 factor-bounds graph:
B1 = 148000000, B2 = 6916103083890 (P-1 stage 2)
B1 = 50000000, B2 = 2550000000 (P-1 stage 2)
B1 = 148000000 (P-1 stage 1)
B1 = 50000000 (P-1 stage 1)
B1 = 10000000, B2 = 300000000 (P-1 stage 2)
B1 = 5000000, B2 = 200000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 5000000 (P-1 stage 1)
B1 = 262144, B2 = 26214400 (P-1 stage 2)
B1 = 131072, B2 = 13107200 (P-1 stage 2)
B1 = 100000, B2 = 10000000 (P-1 stage 2)
B1 = 65536, B2 = 6553600 (P-1 stage 2)
B1 = 262144 (P-1 stage 1)
B1 = 32768, B2 = 3276800 (P-1 stage 2)
B1 = 131072 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 65536 (P-1 stage 1)
B1 = 32768 (P-1 stage 1)
103
104
105
106
107
108
109
103
104
105
106
107
108
109
1010
1011
1012
1013
TF factor-bounds graph:
267
266
265
264
263
262
261
260
259
258
257
256
255
254
253
250
260
270
280
290
2100
2110
2120
2130
2140
Last modified: 2022-06-09T18:56:07+00:00