Historical natural (non-malicious) forks:
1x block length 4 (starting from block 174161)
1x block length 3 (starting from block 174120)
4x block length 2 (starting from blocks 93669, 174233, 179217 and 179639)
Historical natural (non-malicious) forks:
1x block length 4 (starting from block 174161)
1x block length 3 (starting from block 174120)
4x block length 2 (starting from blocks 93669, 174233, 179217 and 179639)