Search with "Hash sign" in Solr

I am new to Solr and facing problems while optimizing the search in solr. When i search for "C4902AN#140", it displays results with "140" first and result with ""C4902AN#140" is appearing later.i.e. after results containing "140".But I want result with "C4902AN#140" before results having "140".

Thanks in advance!!!