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back to boardWA#54 Posted by Delta67 18 Apr 2017 08:13 What's the test like? Re: WA#54 Very stupid algo that in a single loop from i=2 to 2*10^6 checks whether i|N works Because of if we take any combination Factor[20] of primes where at least one Factor[j]>2*10^6 than product of Factor[j] larger than 10^18. Re: WA#54 Try tests like 2^18 multiplied with twin primes, all should yield yes. Test cases: 3932160 3145728 7864320 34603008 80216064 228065280 451411968 927989760 1340080128 2700607488 3029336064 4956094464 5858918400 8446279680 9613344768 10225188864 13567524864 15036579840 19039518720 20772814848 25436356608 31655460864 46132101120 48809115648 55831953408 71293206528 85021163520 94214553600 99957080064 107878023168 114016911360 171780341760 176911024128 179504676864 192756056064 203696898048 All yes. Re: WA#54 The thing is you should go up to sqrt(n/(2^18)) not sqrt(n/(2^19)). Re: WA#54 Dear Ciprian, I think that some of your samples are wrong. 3145728=2^20*3^1 and the answer should be No. The same situation is for the last number, 203696898048 (my accepted program outputs No). Re: WA#54 Marginean Ciprian, I think you are wrong, I got this. Number: 3932160 -> Yes Number: 3145728 -> No Number: 7864320 -> No Number: 34603008 -> No Number: 80216064 -> No Number: 228065280 -> No Number: 451411968 -> No Number: 927989760 -> No Number: 1340080128 -> No Number: 2700607488 -> No Number: 3029336064 -> No Number: 4956094464 -> No Number: 5858918400 -> No Number: 8446279680 -> No Number: 9613344768 -> No Number: 10225188864 -> No Number: 13567524864 -> No Number: 15036579840 -> No Number: 19039518720 -> No Number: 20772814848 -> No Number: 25436356608 -> No Number: 31655460864 -> No Number: 46132101120 -> No Number: 48809115648 -> No Number: 55831953408 -> No Number: 71293206528 -> No Number: 85021163520 -> No Number: 94214553600 -> No Number: 99957080064 -> No Number: 107878023168 -> No Number: 114016911360 -> No Number: 171780341760 -> No Number: 176911024128 -> No Number: 179504676864 -> No Number: 192756056064 -> No Number: 203696898048 -> No Re: WA#54 Proof: 3932160 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 5 Repetitions: 18 1 1 Sum of repetitions equals 20?: Yes 3145728 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 Repetitions: 20 1 Sum of repetitions equals 20?: No 7864320 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 5 Repetitions: 19 1 1 Sum of repetitions equals 20?: No 34603008 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 11 Repetitions: 20 1 1 Sum of repetitions equals 20?: No 80216064 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 17 Repetitions: 19 2 1 Sum of repetitions equals 20?: No 228065280 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 5 29 Repetitions: 19 1 1 1 Sum of repetitions equals 20?: No 451411968 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 7 41 Repetitions: 19 1 1 1 Sum of repetitions equals 20?: No 927989760 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 5 59 Repetitions: 20 1 1 1 Sum of repetitions equals 20?: No 1340080128 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 71 Repetitions: 21 2 1 Sum of repetitions equals 20?: No 2700607488 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 17 101 Repetitions: 19 1 1 1 Sum of repetitions equals 20?: No 3029336064 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 107 Repetitions: 20 3 1 Sum of repetitions equals 20?: No 4956094464 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 23 137 Repetitions: 19 1 1 1 Sum of repetitions equals 20?: No 5858918400 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 5 5 149 Repetitions: 19 1 2 1 Sum of repetitions equals 20?: No 8446279680 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 5 179 Repetitions: 20 2 1 1 Sum of repetitions equals 20?: No 9613344768 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 191 Repetitions: 24 1 1 Sum of repetitions equals 20?: No 10225188864 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 11 197 Repetitions: 19 2 1 1 Sum of repetitions equals 20?: No 13567524864 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 19 227 Repetitions: 20 1 1 1 Sum of repetitions equals 20?: No 15036579840 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 5 239 Repetitions: 22 1 1 1 Sum of repetitions equals 20?: No 19039518720 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 5 269 Repetitions: 19 3 1 1 Sum of repetitions equals 20?: No 20772814848 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 47 281 Repetitions: 19 1 1 1 Sum of repetitions equals 20?: No 25436356608 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 13 311 Repetitions: 21 1 1 1 Sum of repetitions equals 20?: No 31655460864 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 29 347 Repetitions: 20 1 1 1 Sum of repetitions equals 20?: No 46132101120 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 5 7 419 Repetitions: 20 1 1 1 1 Sum of repetitions equals 20?: No 48809115648 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 431 Repetitions: 22 3 1 Sum of repetitions equals 20?: No 55831953408 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 7 11 461 Repetitions: 19 1 1 1 1 Sum of repetitions equals 20?: No 71293206528 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 29 521 Repetitions: 19 2 1 1 Sum of repetitions equals 20?: No 85021163520 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 5 19 569 Repetitions: 19 1 1 1 1 Sum of repetitions equals 20?: No 94214553600 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 5 5 599 Repetitions: 21 1 2 1 Sum of repetitions equals 20?: No 99957080064 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 103 617 Repetitions: 19 1 1 1 Sum of repetitions equals 20?: No 107878023168 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 107 641 Repetitions: 19 1 1 1 Sum of repetitions equals 20?: No 114016911360 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 5 11 659 Repetitions: 20 1 1 1 1 Sum of repetitions equals 20?: No 171780341760 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 3 5 809 Repetitions: 19 4 1 1 Sum of repetitions equals 20?: No 176911024128 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 137 821 Repetitions: 19 1 1 1 Sum of repetitions equals 20?: No 179504676864 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 23 827 Repetitions: 20 2 1 1 Sum of repetitions equals 20?: No 192756056064 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 11 13 857 Repetitions: 19 1 1 1 1 Sum of repetitions equals 20?: No 203696898048 Prime factors: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 7 7 881 Repetitions: 19 2 2 1 Sum of repetitions equals 20?: No |
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