output

20190823
20300317
20360317
20400307
20400823
20480107
20600317
20660617
20700103
20700223
20700307
20700523
20721013
20910103
20930113
21000313
21000907
21050503

prime_date.sh

#!/usr/bin/bash -e

for i in $(seq 1 36500);
do
    d=$(date -d +${i}day +'%Y%m%d')
    # echo $d
    ok=1
    for j in $(seq 1 8);
    do
        f=$(factor $(tail -c+$j <(echo $d)) | wc -w)
        if ((f != 2)); then
            ok=0
            break
        fi
    done

    if ((ok)); then
        echo $d
    fi
done