
e3.tlsfun.de
evil e=3RSA with an exponent of 3 (e=3) is a bad choice. If you want some background info read the FAQ. Check your website's certificate (input domain name):. Check your e value (decimal integer):. Will probably fail for large e values that don't fit into 64 bit. RSA keys with very small exponents like e=3 are a risky choice. Recommendations and best practises to avoid very small exponents have been there for years. In 2014 six certificate authority included in mainstream browsers use e=3.
http://e3.tlsfun.de/