Department of Mathematics and Computer Science, University of Tennessee at Martin, Martin, Tennessee 38238 ; Department of Mathematics and Computer Science, University of Tennessee at Martin, Martin, Tennessee 38238
Abstract:
For each prime , let be the product of the primes less than or equal to . We have greatly extended the range for which the primality of and are known and have found two new primes of the first form ( ) and one of the second (). We supply heuristic estimates on the expected number of such primes and compare these estimates to the number actually found.