is 2 150551 - 1
has 45321 decimal digits
takes 0.000 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual267197.367873.1343%1300000000130539091683003,299.992527.1684%3,497.360380.4333%
Target2440.000059.0909%2600500000.00007.1443%0.000062.0136%
Difference+23+197.3678+14.0434%+1299997400+13053909118300+3,299.9925+20.0241%+3,497.3602+18.4197%

Known prime factors (9 factors, 572.3 bits, 0.38010943% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
15055149359650871032.20116393
132 × 97		-1691695.884e-97.828e-71.593e-6
1505511940701753671237.498644533
53 × 12161		2008-07-2753121611.836e-73.301e-65.732e-6
15055114018128887479591650.3164655608029
33 × 67 × 83 × 101 × 307		2008-08-261013070.00145.198e-79.521e-7
15055176803770721722811652.77025507559140
22 × 5 × 7 × 182196851		2009-03-0571821968510.00680.04600.0859
150551233928313628331591754.37777690720629
523 × 148548223		2014-05-265231485482230.02070.03750.0700
15055142682516500871979840892271.85414175434404577844
22 × 32 × 2063 × 358157 × 532919		2014-05-263581575329195,461.10.00170.0034
15055155627006840133197220472272.23618474472716930873
33 × 383 × 1786526710853		2014-05-2638317865267108538,295.4450.85842.06
15055110802021996273891084393784976093199.7693587495930373724214516604
22 × 32 × 19 × 1323779 × 2563181 × 1545754619		2014-05-28256318115457546191.010e+120.40130.7286
150551298854005679819443247504696383931101.2379925341103008928643698969
17 × 583843594294642861394057		2018-09-07175838435942946428613940579.957e+111.473e+142.752e+14

502 Composite Factors:
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2014-05-28Axon3000000018000000003199.7690.5860.0011.17111.382%
2016-10-31kkmrkkblmbrbkManual testing100000000200000000012-
skipped known factor: 4935965087
skipped known factor: 194070175367
skipped known factor: 1401812888747959
skipped known factor: 7680377072172281
skipped known factor: 23392831362833159
skipped known factor: 4268251650087197984089
skipped known factor: 1080202199627389108439378497609
--0.943--12.080%
2021-02-18Seth_TrManual testing100000000010000000000012-
skipped known factor: 4935965087
skipped known factor: 194070175367
skipped known factor: 1401812888747959
skipped known factor: 7680377072172281
skipped known factor: 23392831362833159
skipped known factor: 4268251650087197984089
skipped known factor: 1080202199627389108439378497609
--29.62--19.301%
2021-04-16Seth_TrManual testing1300000000313300000000-
skipped known factor: 4935965087
skipped known factor: 194070175367
skipped known factor: 1401812888747959
skipped known factor: 7680377072172281
skipped known factor: 23392831362833159
skipped known factor: 4268251650087197984089
skipped known factor: 1080202199627389108439378497609
--84.76--21.315%
2021-11-30Seth_TrManual testing130000000013053909168300-
skipped known factor: 4935965087
skipped known factor: 194070175367
skipped known factor: 1401812888747959
skipped known factor: 7680377072172281
skipped known factor: 23392831362833159
skipped known factor: 4268251650087197984089
skipped known factor: 5562700684013319722047
skipped known factor: 1080202199627389108439378497609
--3,300--27.168%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-07-03ATHec2-P_150000000500000000027--1.576
2021-10-01nordisweet165000000005000000000065--16.31


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-07-27J FeitsmaManual testing??37.498126.19398e-80.0011.28945e-7
2008-08-26ANONYMOUSManual testing??50.316160.0000.0010.001
2009-03-05ANONYMOUSManual testing??52.770160.0030.0010.006
2014-05-26TJAOIManual testing??54.377170.0050.0010.010
2022-09-29LordJuliusManual testing2125850.316160.0010.0010.003
2022-09-29LordJuliusManual testing2125837.498121.83556e-70.0013.82122e-7
2022-09-29LordJuliusManual testing2125854.377170.0210.0010.042
2022-09-29LordJuliusManual testing2125832.201105.88418e-90.0011.22524e-8
2022-09-29LordJuliusManual testing2125852.770160.0070.0010.014
2022-09-29LordJuliusManual testing258259--0.255--
2022-09-29LordJuliusManual testing259260--0.510--
2022-09-29LordJuliusManual testing260261--1.020--
2022-09-29LordJuliusManual testing261262--2.040--
2022-09-29LordJuliusManual testing262263--6.520--
2022-09-29LordJuliusManual testing263264--13.04--
2022-09-29LordJuliusManual testing264265--24.82--
2022-09-29LordJuliusManual testing265266--49.64--
2022-09-29LordJuliusManual testing266267--99.27--


ECM factoring results:
Total ECM effort:1,218.738 GHz-days
Estimated T-Level:40.716
DigitsB1CompleteFacMiss
20110001,224.4080.000%
2550000307.4870.000%
3025000059.9980.000%
3510000009.4560.008%
4030000001.25128.619%
45110000000.14386.665%
50440000000.01498.565%
551100000000.00199.871%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
10.00000e+0
250000250000005268.835
100000010000000096464.77
1000000100000000865.778
30000003000000002,000403.1
30000003874581981,000220.8
300000046200000030071.17
300000051120144830074.41
3000000528000000900226.6
110000002024000000150141.4
various851.9148


Lucas-Lehmer results:
No L-L results for M150551


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-21Oliver KruseOllaptop74278BB2D26275__?
2017-09-22Oliver KruseManual testing74278BB2D26275__?
2017-10-11kkmrkkblmbrbkManual testing
4935965087
194070175367
1401812888747959
7680377072172281
23392831362833159
4268251650087197984089
5562700684013319722047
1080202199627389108439378497609
74278BB2D26275__no
2018-09-08ANONYMOUSdory
4935965087
194070175367
1401812888747959
7680377072172281
23392831362833159
4268251650087197984089
5562700684013319722047
1080202199627389108439378497609
2988540056798194432475046963839
26A47A6710F54D__no
2018-09-08ANONYMOUSdory
4935965087
194070175367
1401812888747959
7680377072172281
23392831362833159
4268251650087197984089
5562700684013319722047
1080202199627389108439378497609
2988540056798194432475046963839
26A47A6710F54D__no
2018-09-09Oliver KruseGTX-0
4935965087
194070175367
1401812888747959
7680377072172281
23392831362833159
4268251650087197984089
5562700684013319722047
1080202199627389108439378497609
2988540056798194432475046963839
26A47A6710F54D__no


P-1 factor-bounds graph:
B1 = 1300000000, B2 = 13053909168300 (P-1 stage 2)
B1 = 1300000000, B2 = 313300000000 (P-1 stage 2)
B1 = 1000000000, B2 = 100000000000 (P-1 stage 2)
B1 = 1300000000 (P-1 stage 1)
B1 = 1000000000 (P-1 stage 1)
B1 = 100000000, B2 = 2000000000 (P-1 stage 2)
B1 = 30000000, B2 = 1800000000 (P-1 stage 2)
B1 = 100000000 (P-1 stage 1)
B1 = 30000000 (P-1 stage 1)
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TF factor-bounds graph:
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266
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264
263
262
261
260
259
258
2
this exponent TF target: 44
TF double-checked to: 67.7
ECM T-Level=40.72 ~= 119-bit
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Last modified: 2023-03-25T13:08:14+00:00