I should give more exact number of txs per block, but I failed.
The following is usual size of a tx(byte) and number of txs per block(2M, 1.9M)
Following is a list of blocks over 1.8MB.
block_no / size / number_of_tx
6581 1899219 5261
6583 1899197 5261
6584 1899234 5261
6586 1899205...