A047829 Becomes prime after exactly 10 iterations of f(x) = sum of prime factors of x.

167073, 212438, 424876, 480226, 492494, 501219, 567614, 595942, 656714, 668319, 670465, 688958, 723853, 738662, 743973, 768817, 791842, 804558, 849752, 849818, 864074, 887613, 888542, 960452, 975662, 984988, 1012786, 1037845, 1048574