Shortest possible period of instability trapped between periods of stability, sequence 130396:
Code:
1879 . 28116816113339690303988014622330170683703057977402649299472740383234225520340773727555280014805801868 = 2^2 * 103 * 13520822671 * 30888267879504915313957111 * 163407600399423280028815329888275915553466823517592666159837069
1880 . 21565324983808816563811984654667078025564581223666594594163503935282011638751318233618519130031635572 = 2^2 * 3 * 35203012220653 * 51049904594899060959312313674573733053334485011911350886121619958677792338351017804027
1881 . 28753766645079851482411303379929631445535663029414286157798338764867493590360600623011151686216205164 = 2^2 * 47 * 6596958106846515056777977291049 * 23184256256278432367374111069885062192818419904693165642579699856397