Prime Factors Calculator – 20 digits!   JavaScripter.net | Math with JavaScript | Divisors | Totient | 100+ Digit Calculator Input a number: Show repeated factors as p^k Run time: This fast factoring calculator is written entirely in JavaScript. Unlike many other JavaScript calculators, it does not have the usual 16-digit limit (up to 253 = 9007199254740992, hence 16 digits only). Here, you can factor 20-digit numbers. In modern browsers, this calculator does most factorizations within a second. In rare worst-case scenarios (for some large semiprimes with 10-digit factors) factorizations might take a couple of minutes. Enjoy! SOME TEST CASES FOR PRIME FACTORIZATION: 9007199254740881 (the largest prime under 2^53) 9007199254740997 (the smallest prime over 2^53) 9007199254740991 = 6361*69431*20394401 9007199254740992 = 2^53 9007199254740993 = 3*107*28059810762433 9999986200004761 = 99999931*99999931 99999989237606677 = 316227731*316227767 999999866000004473 = 999999929*999999937 9999999942014077477 = 3162277633*3162277669 99999980360000964323 = 9999999017*9999999019 99999980380000962361 = 9999999019*9999999019 99994452415200570527 = 4641503*4641503*4641503 99999999999999999999 = 3*3*11*41*101*271*3541*9091*27961 10000000000000000001 = 11*909090909090909091 See also: • 100+ digit calculator: arbitrary precision arithmetic • Euler's totient function φ calculator • Highly composite numbers • Divisors and sum-of-divisors calculator • Binomial coefficients calculator • Fibonacci numbers calculator • Catalan numbers calculator

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