Question 872659
{{{2^a-(5^b*7^c)=0}}}<--->{{{2^a=(5^b*7^c)}}}
{{{2}}} , {{{5}}} , and {{{7}}} are prime numbers.
{{{2^a}}} is a multiple of {{{2}}} but not a multiple of any other prime number.
{{{2^a=(5^b*7^c)}}} is not a multiple of {{{2}}}.
The two expressions can never be the same.
The number of triples satisfying that equation is {{{"0"}}} .