+118723 $${{log}}_{{\mathtt{8}}}{\left({\mathtt{58}}\right)} = {\mathtt{1.952\: \!660\: \!331\: \!709\: \!190\: \!8}}$$
Our web2 calc is pretty impressive 
you could do it just as log58/log8 on any calc
$${\frac{{log}_{10}\left({\mathtt{58}}\right)}{{log}_{10}\left({\mathtt{8}}\right)}} = {\mathtt{1.952\: \!660\: \!331\: \!709\: \!190\: \!9}}$$
.+118723 $${{log}}_{{\mathtt{8}}}{\left({\mathtt{58}}\right)} = {\mathtt{1.952\: \!660\: \!331\: \!709\: \!190\: \!8}}$$
Our web2 calc is pretty impressive
you could do it just as log58/log8 on any calc
$${\frac{{log}_{10}\left({\mathtt{58}}\right)}{{log}_{10}\left({\mathtt{8}}\right)}} = {\mathtt{1.952\: \!660\: \!331\: \!709\: \!190\: \!9}}$$
