Prime number generator in go

ConcurrentPrimes.go

package main

import (
	"fmt"
)

func checkPrime(i int, c chan int) {
	prime := true
	for j := 3; j < i/2; j += 2 {
		if i%j == 0 {
			prime = false
			break
		}
	}
	if prime == true {
		c <- i
	}
}

func primeRange(start, stop int, c chan int) {
	for i := start; i < stop; i += 2 {
		if i%5 != 0 {
			go checkPrime(i, c)
		}
	}
}

func main() {
	startNum := 1
	stopNum := 100000

	if startNum%2 == 0 {
		startNum += 1
	}

	num := make(chan int)

	go func() {
		for {
			select{
			case <-num:
				msg := <-num
				println(msg)
			}
		}
	}()

	primeRange(startNum, stopNum, num)

	// Only to keep the program running
	var input string
	fmt.Scanln(&input)
}