My webpage http://tromp.github.io/cl/cl.html http://tromp.github.io/cl/cl.html demonstrates a concrete shortest program for the characteristic sequence of prime

My webpage http://tromp.github.io/cl/cl.html http://tromp.github.io/cl/cl.html demonstrates a concrete shortest program for the characteristic sequence of prime numbers in a minimal language (if someone can find a shorter program in the same language, I'd be happy to pay a $50 reward).