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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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Task/Wagstaff-primes/Java/wagstaff-primes.java Normal file
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import java.math.BigInteger;
public class Main {
public static void main(String[] args) {
BigInteger d = new BigInteger("3"), a;
int lmt = 25, sl, c = 0;
for (int i = 3; i < 5808; ) {
a = BigInteger.ONE.shiftLeft(i).add(BigInteger.ONE).divide(d);
if (a.isProbablePrime(1)) {
System.out.printf("%2d %4d ", ++c, i);
String s = a.toString(); sl = s.length();
if (sl < lmt) System.out.println(a);
else System.out.println(s.substring(0, 11) + ".." + s.substring(sl - 11, sl) + " " + sl + " digits");
}
i = BigInteger.valueOf(i).nextProbablePrime().intValue();
}
}
}