Find the wrong term in the following series. 569, 571, 577, 589, 619, 639, 681

Checking differences: 571-569=2, 577-571=6, 589-577=12, 619-589=30, 639-619=20, 681-639=42. The differences (2, 6, 12, 30, 20, 42) don't show a clear pattern. Looking at prime-based pattern: 569 is not prime, 571 is prime, 577 is prime, 589 = 19×31, 619 is prime, 639 = 3×213, 681 = 3×227. This suggests the series might include non-primes selectively. Looking at gaps between primes: 571 to 577 (gap 6), 577 to next prime 587 (but we have 589), 587 to 597, etc. Actually, the pattern seems to be: +2, +6, +12, +18 (which would be 607), +24, +30. If the pattern were +2, +6, +12, +18, +24, +30, we'd have: 569, 571, 577, 589, 607, 631, 661. The term 619 breaks this pattern, as 589+18=607, not 619. Hence 619 is the wrong term.