Noticed from Cointelegraph, a solo miner mined Bitcoin block 912632 and almost earned $340K. It's quite surprising to me, though, but the solo miner successfully managed to mine an entire block and was fully rewarded.
Do not mind this what Cointelegraph is publishing, solo miners are always mining blocks.
These are some of the recent blocks mined by solo miners:
912975
912935
912850
912841
All these blocks were mined after the one that you are talking about. It has always been like this if you go through the previous blocks.