//先判断素数
function isprime(num) {
var count = 0;
for ( var i=1; i<=num; i++ ) {
if ( num % i === 0 ) {
count++;
}
}
if ( count === 2 ) {
return true;
} else {
return false;
}
}
for ( var i=1; i<=50; i++) {
for ( var j=100; j>=50; j--) {
if ( i+j===100 && isprime(i) && isprime(j)) {
document.write( i + " " + j + "<br>" );
}
}
}
function isprime(num) {
var count = 0;
for ( var i=1; i<=num; i++ ) {
if ( num % i === 0 ) {
count++;
}
}
if ( count === 2 ) {
return true;
} else {
return false;
}
}
for ( var i=1; i<=50; i++) {
for ( var j=100; j>=50; j--) {
if ( i+j===100 && isprime(i) && isprime(j)) {
document.write( i + " " + j + "<br>" );
}
}
}