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Irregular Primes and Cyclotomic Invariants to Four Million
J. Buhler, R. Crandall, R. Ernvall and T. Metsänkylä
Mathematics of Computation
Vol. 61, No. 203, Special Issue Dedicated to Derrick Henry Lehmer (Jul., 1993), pp. 151-153
Published by: American Mathematical Society
Stable URL: http://www.jstor.org/stable/2152942
Page Count: 3
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Recent computations of irregular primes, and associated cyclotomic invariants, were extended to all primes below four million using an enhanced multisectioning/convolution method. Fermat's "Last Theorem" and Vandiver's conjecture were found to be true for those primes, and the cyclotomic invariants behaved as expected. There is exactly one prime less than four million whose index of irregularity is equal to seven.
Mathematics of Computation © 1993 American Mathematical Society