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The nth Prime Page will now find any of the first 2.623˙10^{15} primes or
π(x) for x up to 10^{17}. Do you have an integer you would like to test for primality? If it is small (say less than 9007199254740991 = 2^{53}  1), then try this script: For larger numbers try Dario Alpern's exceptional online routine to factor and prove primality. Other useful links include
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