We show that Kummer's conjectured asymptotic for the first factor of the class number of a cyclotomic field is untrue assuming the Elliott-Halberstam conjecture and a quantitative twin prime conjecture
Let k(n) denote the number of times we have to apply the Euler \phi-function to n to obtain 1. Assuming the Elliott-Halberstam conjecture we show that k(n) has normal order \alpha \log n for some constant \alpha>0 .
We find explicit bounds for the coefficients of a divisor g of a given polynomial f in terms of the coefficients of f and the degree of g. The best possible such result was later found by Boyd.